List of automotive light bulb types

Light bulbs for automobiles are made in several standardized series. Bulbs used for headlamps, turn signals and brake lamps may be required to comply with international and national regulations governing the types of lamps used. Other automotive lighting applications such as auxiliary lamps or interior lighting may not be regulated, but common types are used by many automotive manufacturers.

International The World Forum for Harmonization of Vehicle Regulations (ECE Regulations) develops and maintains international-consensus UN Regulations on light sources acceptable for use in lamps on vehicles and trailers type-approved for use in countries that recognise the UN Regulations. These include Regulation 37,ECE Regulation No. 37: Uniform Provisions Concerning the Approval of Filament Lamps for Use in Approved Lamp Units on Power-Driven Vehicles and of their Trailers, Revision 7 which contains specifications for filament lamps, and Regulation 99 and its addendaECE Regulation No. 99: Uniform Provisions Concerning the Approval of Light Sources for Use in Approved Gas-Discharge Lamp Units of Power-Driven VehiclesECE Regulation 99 Amendment 3 which covers light sources for high-intensity discharge headlamps. Some UN-approved bulb types are also permitted by some other regulations, such as those of the United States or of Japan, though Japan has begun supplanting the former Japanese national regulations with the international UN regulations.

Filament lamps UN Regulation 37 covers motor vehicle filament lamps. These are categorized in three groups: those without general restriction that can be used in any application, those acceptable only for signalling lights (not for road illumination lamps), and those no longer allowable as light sources for new type approvals but still permitted for production as replacement parts.

Group 1

+Group 1 (Without general restrictions)CategoryFilamentsNominal power(major/minor filamentwhere applicable)Cap (base)per IEC 60061Other approvalsRemarksImageH116 V & 12 V: 55 W24 V: 70 WP14.5sUSA, Japan12V: ECE nominal luminous flux: 1,550 lm ±15%H316 V & 12 V: 55 W24 V: 70 WPK22sUSA, Japan12V: ECE nominal luminous flux: 1,450 lm ±15%H426 V & 12 V: 60 / 55 W24 V: 75 / 70 WP43tJapanSimilar US bulb: HB2 (9003) 12V: ECE nominal luminous flux: 1,650 / 1,000 lm ±15% Available with P45t base to upgrade old headlamps designed for R2 bulb H7112 V: 55 W24 V: 70 WPX26dUSA, Japan12V: ECE nominal luminous flux: 1,500 lm ±10%H8112 V: 35 WPGJ19-1USAECE nominal luminous flux: 800 lm ±15%H8B112 V: 35 WPGJY19-1USAH9112 V: 65 WPGJ19-5USAH9B112 V: 65 WPGJY19-5USAH10112 V: 42 WPY20dUSAANSI № 9145ECE nominal luminous flux: 850 lm ±15%H11112 V: 55 W24 V: 70 WPGJ19-2USAECE nominal luminous flux: 1,350 lm ±10%H11B112 V: 55 W24 V: 70 WPGJY19-2USAH12112 V: 53 WPZ20dUSAANSI № 9055ECE nominal luminous flux: 1,050 lm ±15%H13212 V: 60 / 55 WP26.4tUSAANSI № 9008ECE nominal luminous flux: 1,700 / 1,100 lm ±15%H13A212 V: 60 / 55 WPJ26.4tUSAH15212 V: 55 / 15 W 24 V: 60 / 20 WPGJ23t-1USAECE nominal luminous flux: 26/1350 ±10% Low-wattage filament for DRL function H16112 V: 19 WPGJ19-3H16B112 V: 19 WPGJY19-3H21W112 V & 24 V: 21 WBAY9sH27W/1112 V: 27WPG13USAANSI № 880H27W/2112 V: 27 WPGJ13USAANSI № 881HB3112 V: 60 WP20d 90°USA, JapanANSI № 9005ECE nominal luminous flux: 1700 lm ±15%HB3A112 V: 60 WP20d 180°USAANSI № 9005XSHB4112 V: 51 WP22d 90°USA, JapanECE nominal luminous flux:1000 ± 15% ANSI № 9006 HB4A112 V: 51 WP22d 180°USAANSI № 9006XSHIR1112 V: 60 WPX20dUSA, JapanANSI № 9011HIR2112 V: 55 WPX22dUSA, JapanANSI № 9012HP24W112 V: 24 WExclusively produced by Valeo HPY24W112 V: 24 WAmber, Exclusively produced by Valeo HS126 V & 12 V: 35 / 35 WPX43tFor motorcyclesHS216 V & 12 V: 15 WPX13.5sFor motorcyclesHS5212 V: 35 / 30 WP23tFor motorcyclesHS5A212 V: 45 / 40 WPX23tFor motorcyclesHS6212 V: 40 / 35 WPX26.4tFor motorcyclesPX24W112 V: 24 WPGU20-7PSX24W112 V: 24 WPG20-7ANSI № 2504PSX26W112 V: 26 WPG18.5d-3ANSI № 6851S126 V & 12 V: 45 / 40 WBA20dFor car headlightsS226 V & 12 V: 35 / 35 WBA20dFor motorcyclesS326 V & 12 V: 15 WP26sFor mopeds Group 2 + Group 2 (Only for use in signalling lamps, cornering lamps, reversing lamps and rear registration plate lamps)CategoryCap (Base)FilamentsNominal Power(Major/Minorwhere applicable)Comments ImageFestoonSV7.8 / T8 or C5W(8mm x 28mm)(bulb dia x length)112V 3W; 12V 10W; 24V 3WLengths quoted are tip to tip, nominally. Four are commonly cited by manufacturers: 31, 36, 39 and 41 mm.Wattages are for filament lamps, not LEDsFestoonT10(10mm x 31mm)112 V 10 W; 6V 10W Festoon SV8-5.8 / T11(11mm x 36mm)112V 5W; 12V 10W; 24V 5W; 24V 10WFestoonSV8-5.8 / T11(11mm x 41mm)112V 5W; 12V 10W; 24V 5W; 24V 10WFestoon (14mm x 36mm)112 V, 10 WNot in Narva catalogueFestoon SV8-5.8 / T15(15mm x 41mm)112V 10W; 12V 18W; 12V 21W; 24V 18W Festoon SV8-5.8 / T15(15mm x 44mm)112V 18W (C18W); 12V 21W (C21W); 24V 21W H6WBAX9s112 V: 6 WHY6WBAZ9s112 V: 6 WAmberH10W/1BAU9s112 V: 10 WHY10WBAUZ9s112 V: 10 WAmberH21WBAY9s112 V & 24 V: 21 WHY21WBAW9s112 V & 24 V: 21 WAmberP13WPG18.5d-1112 V: 13 WPW13WWP3.3×14.5-7112 V: 13 WPC16WPU20d-1112 V: 16 WANSI № 7010PCR16WPU20d-7112 V: 16 WRedPW16WWP3.3×14.5-8112 V: 16 W ANSI № 7445PWR16WWP3.3×14.5-10112 V: 16 WRedPWY16WWP3.3×14.5-9112 V: 16 WAmber, ANSI № 7448PS19WPG20-1112 V: 19 WANSI № 5201PSY19WPG20-2112 V: 19 WAmber, ANSI № 2502PW19WWP3.3×14.5-1112 V: 19 WANSI № 7446PWR19WWP3.3×14.5-5112 V: 19 WRedPWY19WWP3.3×14.5-2112 V: 19 WAmber, ANSI № 7449P21WBA15s16 V, 12 V, 24 V: 21 WECE nominal luminous flux: 460lm ± 15% Old designation: P25-1PR21WBAW15s112 V & 24 V: 21 WRedPY21WBAU15s112 V & 24 V: 21 WAmber ECE nominal luminous flux: 280 lm ±20%P21/4WBAZ15d212 V & 24 V: 21 / 4 W PR21/4WBAU15d212 V & 24 V: 21 / 4 WRedP21/5WBAY15d26 V, 12 V, 24 V: 21 / 5 WECE nominal luminous flux: 440/45 lm ±15%/20%. Old designation: P25-2PR21/5WBAW15d212 V & 24 V: 21 / 5 WRedP24WPGU20-3112 V: 24 WPY24WPGU20-4112 V: 24 WANSI № 5200PH24WY112 V: 24 WAmberPS24WPG20-3112 V: 24 WANSI № 5202PSX24WPG20-4?112 V: 24 WANSI № 2504Similar to PS24W, but with slightly different luminous flux tolerancePSY24WPG20-4112 V: 24 WAmber, ANSI № 2503PW24WWP3.3×14.5-3112 V: 24 WANSI № 7447PWR24WWP3.3×14.5-6112 V: 24 WRedPWY24WWP3.3×14.5-4112 V: 24 WAmber, ANSI № 7450P27WW2.5×16d112 V: 27 WANSI № 3156P27/7WW2.5×16q212 V: 27 / 7 WANSI № 3157PR27/7WWU2.5x16212 V: 27 / 7 WRedPY27/7WWX2.5x16q212 V: 27 / 7 WAmberANSI № 3757AR5WBA15s16 V, 12 V, 24 V: 5 WOld designation: R19/5RR5WBAW15s112 V & 24 V: 5 WRedR10WBA15s16 V, 12 V, 24 V: 10 WOld designation: R19/10RR10WBAW15s112 V & 24 V: 10 WRedRY10WBAU15s16 V, 12 V, 24 V: 10 WAmberT1.4WP11.5d112 V: 1.4WT45.6 mm bayonet, used in instrument clusters112 V: 1Wvarious lengths as T4.2, T4.7T3 is even smaller (base hole is 4 mm)T4WBA9s16 V, 12 V, 24 V: 4WOld designation: T8/4W2.3WW2×4.6d112 V: 2.3 WT5 sizeWY2.3WW2×4.6d112 V: 2.3 WAmberW3WW2.1×9.5d16 V, 12 V, 24 V: 3 WT10 size Old designation: W10/3W5WW2.1×9.5d16 V, 12 V, 24 V: 5 WECE nominal luminous flux: 50 lm ±20% T10 size Old designation: W10/5 ANSI № 168WR5WW2.1×9.5d112 V & 24 V: 5 WRedWY5WW2.1×9.5d16 V, 12 V, 24 V: 5 WAmber ECE nominal luminous flux: 30 lm ±20%W10WW2.1×9.5d16 V & 12 V: 10 WT13 sizeWY10WW2.1×9.5d16 V & 12 V: 10 WW15/5WWZ3×16q212 V: 15 / 5 Wfor motorcyclesW16WW2.1×9.5d112 V: 16 WT15 size ANSI № 921WY16WW2.1×9.5d112 V: 16 WAmber, ANSI № 921NAW21WW3×16d112 V: 21 WT20 size ANSI № 7440 WY21WWX3×16d112 V: 21 WAmberANSI № 7440NAWP21WWY2.5×16d112 V: 21 WWPY21WWZ2.5×16d112 V: 21 WAmberW21/5WW3×16q212 V: 21 / 5 WT20 size ANSI № 7443WR21/5WWY3×16q212 V: 21 / 5 WRed

Group 3 + Group 3 (For replacement purposes only)CategoryCap (Base)FilamentsNominal powerComments ImageC21WSV8.5112 V: 21 WOld designation: C15,for reversing lamp onlyH2X511112 V / 55 WECE nominal luminous flux: 1800lm ±15% Deleted from Reg 37 H14212 V: 60 / 55 WP38tJapanECE nominal luminous flux: 1,750 / 1,150 lm ±15%P19WPGU20-1112 V: 19 WPC16WPU20d-1112 V: 16 WPCR16WPU20d-7112 V: 16 WRedPCY16WPU20d-2112 V: 16 WAmberPR19WPGU20-5112 V: 19 WRedPY19WPGU20-2112 V: 19 WAmberPSR19WPG20-5112 V: 19 WRedPSR24WPG20-6112 V: 24 WRedPR24WPGU20-6112 V: 24 WRedR2P45t26 V & 12 V: 45 / 40 W 24 V: 55 / 50 WStandard and higher-wattage versions available with halogen burnerS1BA20d26 V & 12 V: 25 / 25 W for motorcycles

Gas discharge lamps UN Regulation 99 covers gas discharge light sources for use in vehicle headlamps. All light sources acceptable under Regulation 99 are also acceptable under US regulations.

CategoryCap (Base)Nominal powerRemarks ImageD1RPK32d-385 V / 35 WIntegral ignitorFor reflector systemsD1SPK32d-285 V / 35 WIntegral ignitorFor projector systemsD2RP32d-385 V / 35 WFor reflector systemsD2SP32d-285 V / 35 WFor projector systemsD3RPK32d-642 V / 35 WMercury-freeIntegral ignitorFor reflector systemsD3SPK32d-542 V / 35 WMercury-freeIntegral ignitorFor projector systemsD4RP32d-642 V / 35 WMercury-freeFor reflector systemsD4SP32d-542 V / 35 WMercury-freeFor projector systemsD5SPK32d-12 V: 25 WBallast output voltage D6SP32d-142 V: 25 WD7SPK32d-142 V: 25 WD8SPK32d-142 V: 25 W

Germany There is a German national regulation for vehicle bulbs, now superseded by international ECE regulations. Bulbs according to the old German regulation are still manufactured. The German regulation is contained in §22a, Subsection 1, No. 18 of the Straßenverkehrs-Zulassungs-Ordnung (StVZO, Road Traffic Approval Regulation). Per the Fahrzeugteileverordnung (FzTV, Vehicle Parts Regulation), such light bulbs must bear an approval mark consisting of a sine wave and the letter 'K'. The technical requirements themselves are established by standards produced by DIN.

+German vehicle bulbs per DINCategoryNominal powerFilamentsCap (Base)Comments ImageForm K (DIN 72601, Part 4)6 V, 10 W1SV8.5-811 × 41 mmForm K (DIN 72601, Part 4)12 V, 10 W1SV8.5-811 × 41 mmForm K (DIN 72601, Part 6)6 V, 18 W1SV8.5-815 × 41 mmForm K (DIN 72601, Part 6)12 V, 18 W1SV8.5-815 × 41 mmForm K (DIN 72601, Part 6)24 V, 18 W1SV8.5-815 × 41 mmForm R (DIN 72601, Part 6)6 V, 18 W1BA15sForm R (DIN 72601, Part 6)12 V, 18 W1BA15sForm R (DIN 72601, Part 6)24 V, 18 W1BA15sForm S (DIN 72601, Part 7)6 V, 18 / 5 W2BAY15dForm S (DIN 72601, Part 7)12 V, 18 / 5 W2BAY15dForm S (DIN 72601, Part 7)24 V, 18 / 5 W2BAY15d

United States and Canada In the United States, entry 49 CFR 564 in the Code of Federal Regulations requires manufacturers of headlight bulbs, officially known as "replaceable light sources", to furnish the National Highway Traffic Safety Administration (NHTSA) with product specifications at least 60 days prior to first use. The specifications supplied by the manufacturer, on approval by NHTSA, are entered in Federal docket NHTSA-1998-3397. From then on, any light source made and certified by any manufacturer as conforming to the specifications is legal for use in headlamps certified as conforming to Federal Motor Vehicle Safety Standard 108. Light sources for vehicle lamps other than headlamps are not Federally regulated.

In Canada, vehicle headlamps may use light sources (bulbs) conforming to either the US or the international ECE regulations.Canada Motor Vehicle Safety Standard 108

+Replaceable Light Sources for Vehicle HeadlampsBulb TypeTrade NumberCap (Base)FilamentsNominal power @ 12.8v(High/Low beamwhere applicable)Comments ImageHB19004P29t265 / 45 WHB29003P43t-38260 / 55 WH4 with stricter geometric tolerancesHB39005P20d (90°)165 WHB3A9005XSP20d (straight)165 WHB3 w/180° straight baseHB49006P22d (90°)155 WHB4A9006XSP22d (180° straight)155 WHB4 w/180° straight baseHB59007PX29t265 / 55 WH139008P26t265 / 55 W

+OthersCategoryCap (Base)FilamentsNominal powerComments ImagePC194T10 (if removable) or fixed to holder114 V / 3.78W Used on circuit boardsfor e.g. dash lights, gauge cluster backlights.

Similar in size to W3W if

with a T10 base.PC74T1-3/4 (if removable) or fixed to holder114 V / 1.4W Used on circuit boardsfor e.g. dash lights, gauge cluster backlights.

Other countries