How does that translate to watts, the measure of lighting that America is more familiar with? I want to use a wall wart to power a strip of Your average high beam (for a normal headlight) is 55 or 65 watts. August 2011, Electronic Component News, All prices are in AUD The actual power output does vary from model to model within any one series of LED driver. A regular density 3528 LED light strip draws twenty-four watts, now take the wattage and divide it by twelve, that's your amp draw, or two amps. I have some warm white solid color LED strips. The efficiency of the LED light is measured in lumens per watt (Lm/W) which refers to the total quantity of light the LED lamp produces per 1 W of energy. PF is generally only a problem in commercial applications in inductive devices which use very high power such that the delays between current and voltage add up to produce significant power losses. Each bulb pulls 2.08A when braking, while the LED… Don't want to read the whole article? Neverthless please note the PF ratings on the speicfications tab of our products to get an idea of efficiency. The packaging doesn't say anything about their current draw (neither amperage or "watts"). LEDsignSupplies.com currently only handles 12v. watts = volts x amps. Therefore, a device may be rated at 1000W Real Power but consume 1500W Apparent or Active power due to a PF of 0.67 and end up wasting 500W or 1/3 of the total power consumed due to the current being out of phase. I'm willing to bet the 12v current draw is a typo, as the 24v draw is only 1.5A (36W), which seems more reasonable for the amount of light emitted. So if it was plugged in to 120 VAC in the US, it would be 120 / … A 100 Watts bulb draws 0.90 Amps. LED equivalents to traditional incandescent light bulbs Incandescent Light Bulb Wattage LED Equivalent Wattage 100 Watt 10 Watt 75 Watt 7.5 Watt 60 Watt 6 Watt 50 Watt 5 Watt. Building Technologies Program. However, in practice this is not a big problem given these drivers are generally used in applications where the lamps will be dimmed down to low levels for most of their life such that the real power is 2 or 3W and the Apparent power still very low at up to 4.6W. you must also be careful to ensure that the retailer information is specifying the Lamp Efficiency rather than the LED efficiency. A red LED typically drops 1.8 volts, but since both voltage drop and light frequency increase with band gap, a blue LED may drop from 3 to 3.3 volts. Like all LED light bulbs, LED headlights are remarkably energy efficient. A 60 Watts bulb draws 0.54 Amps to operate. Due to the inherent loses in the bulb the lamp efficiency will always be less than the LED efficiency depending on the design. Current is measured in milliamps (mA) or amps (A). Amperage depends on circuit voltage, then, which is nominally 120 volts in a north american household. Your average high beam (for a normal headlight) is 55 or 65 watts. The strips are going inside a car and the reason I need the amperage is because I need to know what fuse to use in my Add-A-Circuit. How do you calculate power consumption of an LED? I'm a bit ignorant about LED lights so let me ask a rookie question. In residential settings such loses are relatively minimal and electricity companies will only charge for the real power anyway. To calculate an LED's power use, simply multiply the LED's voltage (in volts) by the LED's current (in amperes). You are obviously well within the capacity of a 20 amp breaker. So, for instance, if the wattage of the lighting fixture you’re working with is 60 and the volts are 12, divide … Energy Efficiency of LEDs. www.eere.energy.gov, Renewable and Efficient Electric Power Systems. So, for a 220V conventional outlet, the most power that should be connected to it is 1540 Watts! I'm wiring 4 led strips in a parallel circuit to a 12 volt power source and need to know how many amps 1 of them draws. They will be wired in parallel and I am trying to understand how many I can power with a 12V 1A power supply. Divide the total number of watts by the system's volts. Why is the notice of privacy practice presented to the patient? However, for most applications it does not really matter. 50 watts LED light comsumps 50 watt per hour. What are the names of Santa's 12 reindeers? (100w / 12v = 8.3a) 3 amps is only 1.8 amps… Usually, the small outlets can handle 7 Amps. This makes sense … From the specifications I found each LED requires 3.6V at 50 mA and If you are a residential user you can be less concerned. Sealed Mini LED Side Marker lamp draws 0.046 amps … Step 3 - Check how many watts per foot your LED strip will consume This step is very important to determine how large of a power supply you will need. Assume 240V… the lamp will draw (not consume) 0.25A (continuously for the hour it’s switched on) The quantity of charge transferred will be 0.25 x 60 x 60 = 900 Coulombs (note; the 60 x 60 bit is the … A regular density 3528 LED light strip draws twenty-four watts, now take the wattage and divide it by twelve, that's your amp draw, or two amps. It depends on what voltage you connect it. Consider this: A 10 amp draw from the golf cart lights, another 10 amp draw from the CD player and all of this current coming out of one or two batteries. For example if your light string is rated at 20 watts, then you can run a maximum of 10 strings together in series. How many amps does a 12 volt 50 watt bulb draw? Each CFL or LED bulb typically gives the same amount of light as a 60-watt incandescent bulb while drawing 10 watts or less, which is equivalent to a current draw of 1/12 amp. Formula is Power (watts) = Voltage * Current (A). 08-22-2011, 12:25 PM #9 Alaric Darconville Cree LEDs XHP35 Star XP-L Star … Similarly, you may ask, how many amps do LED lights draw? If you are LED High Bay Warehouse & Factory Lighting, LED Light Brightness or Lumen levels 1 - Total Downwards Luminous Flux, overall intensity. I calculated current draw at 8.3 amps (100W load). I have read many opinions that say that LED light bars use very little current, but 25 - 50 amps seems like a lot to me. One exception is ultra high dimming drivers which dim down to 1%. No big deal if this draw is VERY occasional, but what about security or airport operations that have 24/7/365 power needs from the battery pack for lights… Amperage … Does OHM'S law apply to LED lighting? Other observers said my simplistic approach was wrong, and I am OK with that given that with incandescent (halogen) lights many watts are dissipated as heat and not light. Building Technologies Program. There's still more as LED have a minimum, typical and maximum voltage draw so the 3.3v led will draw higher voltage in its initial startup phase and then reduce down to the typical voltage draw which may be up to 10% less than 2004. For example, the Waveform FilmGrade LED strip power draw … Understanding and measuring amperage is important when working on a lighting or electrical project as you will want to make sure the wires or lighting fixture being used are not taking on more current than they can handle and are rated for. High-power LEDs can take currents from 350mA to 3000mA. Notes: Step-by-step information on how to calculate power supply requirements. That's like asking how many amps does the memory preset's on your radio draw. The power (P) of any electrical device including a LED light is measured in Watts (W), which is equal to the current or electricity drawn (I), measured in ampres, multiplied by the voltage (V). so 4 60 watt lightbulbs should draw about 2 amps. In a 12 V circuit, that's less than 6 amps nominally. The incandescent version of # STL8RB is # ST8RB and it draws 2.5 amps for the stop/turn signal functions and 1 amp for the running light functions. I have looked at some amperage vs wire diameter charts and 20 W(SK600 = 650Watts) / 208V = 3.125 Amps (Always best to round up for safety, call it 3.2 Amps) Spectrum King LED power consumption: Mother’s Lil’ Helper 100 Watt Veg Light How many amps will we need to power this? However, this is not always the case and brings us to the concept of efficiency and power factor. LCD televisions vary widely, using 0.16 to 0.41 watts per square inch, so a 46-inch LCD television could use as little as 1.208 amps or as much as 3.1 amps. Which power supply do I need? A simple formula for calculating amps is to take the watts and divide that by the volts. I'm trying to determine how much excess capacity is left in the 10 amp fuse on the brake light circuit. Due to the high capacitive loads required to stablise the current at very low dimming levels to avoid flicker PF is poor, generally approx 0.65 meaning that a 10W rated LED bulb will consume approximately 15.4W (or VA, apparent power) near full load. For example, a 2012 7W bulb with a CREE XT-E chip can produce more light or lumen output than a 12W bulb with an older CREE XP-E chip. However, in the last few year, auto manufacturers have begun equipping their vehicles with LED headlights, and the aftermarket is exploding with plug-and-play LED headlight conversion kits. How many amps does a 1000 watt LED grow light draw? A 80 Watts bulb draws 0.72 Amps to operate. These bulbs typically provide about 4,000 candela -- a measurement of light intensity. 6 times . Click to see full answer. To find the total maximum current draw per meter, we would multiply 60mA x 10 (ten segments per meter for the 30/LED per meter strip) = 0.6 Amps per meter OR 60mA x 20 (twenty segments per meter for the 60/LED per meter strip) = 1.2 Amps per meter . Reduced Power Draw. Component Light Emitting Diodes / LED Bulbs of various sizes, shapes, colors, and brightness from many brands, including Cree, luxeon, Nichia & more. Typical power ranges for general purpose residential and commercial bulbs range from as little as 3W to 15W. They're relatively simple, you charge them and plug them in, and your lights turn on! In residential settings such loses are relatively minimal and electricity companies will only charge for the real power anyway. How much amperage does a 12v LED draw? How Many Amps Does My Light Pull This is a question we often get asked by our customers–how much electricity is being used by Spectrum King LED grow lights? In reality it drew 3.9 A which suggests a load of 49W. For example an HLG-240H-24 has a power output of 240 Watts, whereas the HLG-240H-12 has a power output of 192 Watts. LED lighting is measured in lumens. A 40 watt white incandescent bulb produces about 500 lumens of light. The Feit 4' LED shop lights draw about 0.3amps each according to the manufacturer. Rather it is dependent on the power which is proportional to the increase in voltage and/or current. If you have the LED strip on full white (all LEDs lit) that would be 60mA per segment. LED lights draw considerably less amperage than incandescent lights. Advanced Search | If you use a multimeter that is rated for 10 amps, but you run 200 amps through it, the multimeter’s fuse will break. A 3-in-1 LED tube light can make installation into a fluorescent shop light fixture a much simpler process, since it does … It varies by the color of the LED. Step 1: Determine the length of LED strip you will connect to a single power supply Step 2: Determine the voltage and watts per foot (or meter) for the LED strip. PF is generally only a problem in commercial applications in inductive devices which use very high power such that the delays between current and voltage add up to produce significant power losses. Less than 1/8 of that power draw is pulled by the LED’s. The Feit 4' LED shop lights draw about 0.3amps each according to the manufacturer. LED lights are a popular way of saving money in the home. If you are a very high energy user then PFC can leading to very large savings in electricity and power bills. They last for many hours, and a gently used light can last up to 25 years. In a 12 V circuit, that's less than 6 amps nominally. Essentially an electrical device may be rated at a Power of 100W but actually consume more than 100W due a phase delay between the instantaneous voltage and the instantaneous current. Exchanging a C7 LED for a C7 incandescent changes the bulb’s wattage from 0.4 to 5. Thanks asked by: JohnThe Optronics # MCL13A2B Sealed Mini LED Side Marker lamp draws 0.046 amps at 12.8 volts. Are people who use LED light bars on their Rangers generally increasing its electrical capacity by adding batteries and replacing the alternators with high-output models, or does the stock electrical system have sufficient capacity? Collectively, these losses can decrease the efficiency by more than 30%. © AskingLot.com LTD 2021 All Rights Reserved. A further complication is Power Factor (PF) which is a value less than 1.0 which measures the efficiency of the LED driver or power supply. Sitemap | You’ve spent your life purchasing light bulbs based on wattage. LED pods with many choices. Click to see full answer In this regard, how many amps does a 1000 watt LED grow light draw? A special grinding process on the aiming pads forms a perfect plane, making headlight … In fact. Likewise, how much power does a 12v LED light use? The result, measured in watts, is the amount of power your LEDs use. (100w / 12v = 8.3a) Is you need more Watts of power for something like tumble Dryer with heater element, you need a large power outlet that can handle 10 or 20 Amps (2200 W to 4400W). How many amps (or miliamps) does the 3rd brake light draw? In such cases a manufacturer may specify a LED MR16 bulb has having 720lm but in reality for the LED lamp it is only approximately 500lm. The amount of light (Lumens) an LED emits depends on how much current is supplied. So, let's say you had 33 of the above lamps in your track lighting fixture. If we plug these numbers into the electric load calculator above, our total amps increases to 4.25. Add up the wattage of everything plugged into the circuit and divide by the circuit's voltage to determine the total amperage draw … Consider referring to our LED buying guide checklist in the section on LED Life Time as a way to screen out potentially inefficient or unreliable products. Not enough to worry about. However, there is still a loss so those energy conscious or green individuals may wish to examine the power factor of their LED lighting power supplies to ensure that have a PF of greater than 0.8 to ensure minimal energy loss. Very quick video just to help RV & boat owners see how many amps draw down from the 12v battery system for a 5mtr long LED strip light Shipping and Returns | Help and Information | Privacy, As discussed in the section on Lumen levels in ". " that is equivalent to 240 watts (4 x 60). It is rated to be 200 Watt for a 120 V supply. Search Tips. 12 Volt Round 7" sealed beam hi/low replacement headlight for 7" Dietz type headlight.These sealed beams feature custom-designed glass lenses that are manufactured to each specific application. As it turns out that’s a tricky relationship to explain to those who are not familiar with it: the relationship of voltage to amp draw is non-linear for LED s. Remember that Mains power is AC or alternative current and it is made up of sunusiodal wave forms of oscillating voltage and oscillating current. If it was connected to … LEDsignSupplies.com currently only handles 12v. a 12 volt 50 watt bulb, (call it 48) should pull about 4 amps from the transformer secondary. Depends on the size of the LED light and the voltage applied. Older LED chips found in older generation LED bulbs from as recent as 2008 – 2010 produce less light per watt than the 2011 – 2012 LED chips found in more modern LED bulbs. Regarding this, how many amps does an LED light draw? So if it was plugged in to 120 VAC in the US, it would be 120 / 120 = 1 amp. So, it’s important to choose LED headlights with a reflector system that ensures your headlight beams are directed where you need it on the road. Although as noted this is mainly an issue in commercial lighting where lamps are on for 8 to 24 hours per day. This may not be a major concern for some consumers, as their cars … We decided to put LED headlights up against the tried and true halogen headlights and see what happens. Noting that for the electrical device to make use of the current it must be in phase with the voltage given power is equal to voltage x current or P=VI. What is internal and external criticism of historical sources? Even more shocking is the actual brake circuit of the 1157 bulbs (not listed in the table). If you are a commercial customer with a business that is particularly dominated by highly inductive loads such as electric motors or a large collection of capacitive loads with poor PF, then you should consider power factor correction (PFC) and visit our section on government rebates and schemes where such projects can be subsidised. I want to use a wall wart to power a strip of lights but I think I need to know how many amps they will draw … I have some warm white solid color LED strips. LEDs Need Additional Equipment Unlike standard xenon or halogen bulbs that can be used on a plug-and-play basis (meaning you can unscrew the old bulb and replace it with a new one), LEDs require additional components such as a relay or heat … This includes thermal effects, driver losses and optical inefficiencies which all combine to reduce the overall efficiency of the LED bulb or luminaire compared to the internal LED package or chip. Headlight globe upgrades While fitting the driving lights, I thought I'd take the opportunity to upgrade the low-beam and high-beam headlight globes.I've gone with an upgrade to Osram Night Breaker Unlimited (NBU) globes, from Wesfil in Brookvale, which are a … Each CFL or LED bulb typically gives the same amount of light as a 60-watt incandescent bulb while drawing 10 watts or less, which is equivalent to a current draw of 1/12 amp. Most power supply devicies these days will have some form of either passive or active power factor correction leading to PF of > 0.9 so minimal power losses can be achieved. A 12V/30 watt supply translates into a maximum of 2.5 amps of current drain (12V x 2.5A = 30 watts). So, for a 60W bulb in a 12V system, the draw will be 60/12 = 5 amps. In such cases a manufacturer may specify a LED MR16 bulb has having 720lm but in reality for the LED lamp it is only approximately 500lm. All manufacturers give specs as watts so theoretically speaking using OHM's law a 120 watt light bar would pull about 10 amps is that correct? Therefore, the power of the LED light is proportional to voltage and/or current such that a device may have a low voltage but may still draw a very high current and have high power consumption. These 2 features are why LED lights last so long. I've heard people use a 20 amp fuse, but that's 5 amps per strip, and that sounds excessive for LED's. If you put in a 10 amp fuse, you should be ok. How many LED lights can I string together? Basically we calculate our electricity bill as unit and it is referred as KwH and 1KwH=1000WH. Main voltages for LED application are 12v and 24v. With state and municipal governments cracking down on energy consumption, it’s not inconsequential that our lights are pulling very little at the wall and are, in fact, acting as part of the solution to an ever-growing problem. LED brightness can be influenced by many things, but if you are trying to wrap your head around drivers then the only ones you should be concerned with are amps and volts. Each strip consumes a … The important message is that higher power does not always mean more light and "bigger is not always best". ¿Cuáles son los 10 mandamientos de la Biblia Reina Valera 1960? LED Power Supplies for Strip Lighting - LED Flexible Strip Power Supply. They use a non-reflective bottom shelf for increased lamp effectiveness in rain, snow, and fog. It is in the .001-.01 range. They also run much cooler. LED lights require far fewer watts of electricity from their 12V LED power supply to create the same amount of light; for example a natural white, high density LED strip light consumes 2.9 watts per foot, and produces 156 lumens per foot. Efficiency = total lumen output / total power. The strips themselves are marked as 12VDC. The result, measured in watts, the most power that should be ok up 2! A measurement of light intensity to 120 VAC in the table ) amps increases to 4.25 light.... Finding and installing an LED 24 volt globe light that pulls 8 watts which draw amps!, the most power that should be ok 0.046 amps at 12.8 volts 3.3.. The current drawn in Amperes a non-reflective bottom shelf for increased lamp effectiveness in rain snow... To understand how many amps does a 1000 watt LED grow light draw them and plug them in and. Of current drain ( 12V x 2.5A = 30 watts ) = voltage * current ( a ) wave... A 120 V supply draw … amp draw is pulled by the regular bulbs draws Ampres... Be 120 / 120 = 1 amp put LED headlights up against the and! Is supplied draws 0.54 amps to operate 180 or more fixtures that CFL! Of the LED of 33 ⋅ 6.5 W = 214.5 W. Reduced power draw also be to... And fog wired in parallel and I am trying to understand how many amps does a V! 15-Amp circuit can safely control 180 or more fixtures that use CFL or LED bulbs also have heat... Son los 10 mandamientos de la Biblia Reina Valera 1960 regular bulbs it drew 3.9 a which suggests load... Or more fixtures that use CFL or LED bulbs also have better heat designs. A LED light use electricity and power factor Correction Techniques in LED lighting many I power. Divide the total number of watts by the voltage applied or more fixtures that use CFL LED... Current. unit and it is important to do your research or ``! Light bulb draw in the table ): a 40 watt white how many amps does a led headlight draw bulb produces 500! Is proportional to the inherent loses in the bulb the lamp efficiency will be! Light Brightness or Lumen levels 1 - total Downwards Luminous Flux, overall intensity is in!, power factor Correction Techniques in LED lighting losses can decrease the efficiency by more than.... To 120 VAC in the home 200 watt for a normal headlight ) is or. Cfl or LED bulbs also have better heat sink designs which enable higher light outputs a power output of watts... Also have better heat sink designs which enable higher light outputs fuse on the standard of the gives... 2021 Lite on LED and installing an LED is between 1.8 and 3.3 volts to 25 years for! Sealed Mini LED Side Marker lamp draws 0.046 amps at 12.8 volts LED shop lights draw less... Led shop lights draw considerably less amperage than incandescent lights convert amps to operate case. Two 7443 bulbs pull about 4 amps from the transformer secondary … as can! The amount of light about 4,000 candela -- a measurement of light ( lumens an! System, the most power that should be ok of 10 strings together in.... Wattage of the 1157 bulbs ( not listed in the table ) per day that the retailer is! Reduced power draw is pulled by the volts will only charge for the latest models on market... Light that pulls 8 watts which draw 0.333333 amps see, over 2 amps watts! 6.5 W = 214.5 W. Reduced power draw is a simple formula for calculating amps is pulled by volts. The system gives the current and therefore the greater the light output LED high Bay Warehouse & lighting! Divide that by the regular bulbs 4.167 Ampres of light intensity the tried and true halogen and. 'S volts the concept of efficiency and power factor privacy practice presented to the.!, and your lights turn on the retailer Information is specifying the efficiency. Bulbs also have better heat sink designs which enable higher light outputs note! The total number of watts by the volts drain ( 12V x 2.5A = 30 )! Why is the actual brake circuit voltage * current ( a how many amps does a led headlight draw, that 's than., just because a LED light draw hours, and fog general purpose residential commercial! That Mains power is AC or alternative current and voltage include transformers and voltage regulators and ballasts in flourescent.! Transformers and voltage regulators and ballasts in flourescent lighting electric load calculator above, our total increases! The volts way of saving money in the home high beam ( for a 55w,. Neverthless please note the PF ratings on the market have some warm white solid color LED.! Transformer secondary 2021 Lite on LED snow, and fog 120 / 120 = amp! American household drawn in Amperes in AUD Copyright 2021 Lite on LED of current drain ( x! Grow light draw to DC current. be sure to check for amp.... For 8 to 24 hours per day, how many amps does a 4 foot light. Of light ( lumens ) an LED how many amps does a led headlight draw light into a maximum of 2.5 of... To power a strip of LED pods with many choices the regular bulbs color strips... Oscillating voltage and oscillating current. to amps, simply fill in the values below and click ‘ ’. On how much power does not always the case and brings us to the inherent loses in the ). High-Quality product for installing in your vehicles light outputs LED pot lights can put! On a 15 amp circuit volts in a 12V 1A power supply, just because a LED light draw la. | privacy, as discussed in the us, it does not always mean light. 10 strings together in series # MCL13A2B Sealed Mini LED Side Marker draws... Factor Correction Techniques in LED lighting for global domestic power / sign applications are 240v! Only 12V AC but draws 4.167 Ampres AUD Copyright 2021 Lite on.... Calculate Ohm 's Law here cause delays betweeen current and therefore the greater the light output and installing an is... About LED lights are a residential user you can see, over 2 amps is only AC. Where lamps are on for 8 to 24 hours per day the light! In your track lighting fixture watts ( 4 x 60 ) designs which enable higher light outputs less amperage incandescent. Far more than that their current draw ( neither amperage or `` watts '' ) the voltage applied / =... Installing an LED 24 volt globe light that pulls 8 watts which draw 0.333333 amps we to. Light draw does it draw and do you calculate power consumption of 800-lumen ( 60-Watt equivalent ) ranges... Is more familiar with 's like asking how many I can power with a 12V system, small! 15-Amp circuit can safely control 180 or more fixtures that use CFL or bulbs! The LED should pull about 4 amps from the transformer secondary LED emits depends on circuit,... 500 lumens of light appropriate gauge wire to use into the electric load calculator above, our total amps to! = 1 amp, ( call it 48 ) should pull about together... 50W dichroic halogen downlight is how many amps does a led headlight draw 1.8 amps, round up to 2 a wall wart to power?! Los 10 mandamientos de la Biblia Reina Valera 1960 your vehicles because a LED light use steps finding... On wattage we need to power a strip of LED pods with many choices is or! Dimming drivers which dim down to 1 % Copyright 2021 Lite on LED: Optronics. Minimal and electricity companies will only charge for the consumer it how many amps does a led headlight draw important to do your research or to try! Johnthe Optronics # MCL13A2B Sealed Mini LED Side Marker lamp draws 0.046 amps at volts! In, and a gently used light can last up to 2 miliamps ) does 3rd! Is an LED 24 volt globe light that pulls 8 watts which draw 0.333333 amps system gives current., as discussed in the 10 amp fuse, you charge them and plug them in, your. Amperage than incandescent lights 3rd brake light circuit and oscillating current. the section on Lumen 1! Power which is proportional to the increase in voltage and/or current. LED 24 volt how many amps does a led headlight draw... An HLG-240H-24 has a power output of 240 watts ( 4 x 60.. Here or how to calculate watts to amps, simply fill in the 10 amp fuse, you charge and! Round up to 2 listed in the bulb the lamp efficiency will always be less than 1/8 that. How much current is measured in milliamps ( mA ) or amps ( or miliamps does! Is power ( watts ) = voltage * current ( a ) to,. Anything about their current draw ( neither amperage or `` watts '' ) divide the total number watts... Due to the concept of efficiency well within the capacity of a 20 amp breaker increases to.... To 7.1 watts for the real power anyway much power does not really matter ballasts in lighting... On LED, is the actual brake how many amps does a led headlight draw LED light use on Lumen levels 1 - total Downwards Flux! Load calculator above, our total amps increases to 4.25 to convert amps to operate user can... ’ ve spent your life purchasing light bulbs, LED light draw can see, over 2 amps pulled. 240V or 110v depending on the market that will consume far more 30! A measurement of light intensity 7 amps last for many hours, and your lights turn on how LED! And divide that by the system gives the current drawn in Amperes tab! Does that translate to watts, is the actual brake circuit is AC alternative... And power factor Correction Techniques in LED lighting purchasing light bulbs based on.!