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H4 vs H7 bulb: what's the difference between the bulbs and which is better?

Light and visibility are critical to your safety on the road. Nowadays, new car have xenon or LED headlight bulbs. However, halogen lamps remain the most common type and can be found on around 80% of cars. They emit a high-intensity yellow-white light and are very cheap to produce. Common bulb fittings include H1, H3, H6, H4 and H7.

H4 bulbs for headlights and fog lights

H4 lamps

‘H4’ indicates that they are dual-filament lamps, also known as bilux bulbs, which means that each bulb contains two filaments. This allows them to be used as both high and low beam lights with one filament for each beam. They are designed with only one lamp base plate.

-50%
D1S OSRAM XENARC ORIGINAL 66140 Bulb, spotlight D1S 85V 35W Pk32d-2, 4300K, Xenon
Parts Details
  • Product line: XENARC ORIGINAL
  • Lamp Type: D1S
  • Light Design: Xenon
  • Rated Power [W]: 35
  • Voltage [V]: 85
  • Colour Temperature [K]: 4300
  • Socket Type bulb: Pk32d-2
  • XenonLight: 1
  • OSRAM: Bulb, spotlight
  • Item number: 66140
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 66140
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 98,28
£ 48,21
(Price per item)
price incl. 20% VAT, excl. delivery costs
D3S PHILIPS Xenon Vision 42403VIC1 Bulb, spotlight D3S 42V 35W PK32d-5, 4100K, Xenon
Parts Details
  • Product line: Xenon Vision
  • Lamp Type: D3S
  • Light Design: Xenon
  • Rated Power [W]: 35
  • Voltage [V]: 42
  • Packing Type: Box
  • Colour Temperature [K]: 4100
  • Socket Type bulb: PK32d-5
  • XenonLight: 1
  • PHILIPS: Bulb, spotlight
  • Item number: 42403VIC1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 42403VIC1
£ 78,98
(Price per item)
price incl. 20% VAT, excl. delivery costs
HIR2 PHILIPS LongLife 9012LLC1 Bulb, spotlight HIR2 12V 55W PX22d, 3700K, Halogen
Parts Details
  • Product line: LongLife
  • Lamp Type: HIR2
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Packing Type: Box
  • Colour Temperature [K]: 3700
  • Socket Type bulb: PX22d
  • PHILIPS: Bulb, spotlight
  • Item number: 9012LLC1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 9012LLC1
£ 26,88
(Price per item)
price incl. 20% VAT, excl. delivery costs
-59%
H1 OSRAM ORIGINAL LINE 64150 Bulb, spotlight H1 12V 55W P14.5s, 3200K, Halogen
Parts Details
  • Product line: ORIGINAL LINE
  • Lamp Type: H1
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: P14.5s
  • OSRAM: Bulb, spotlight
  • Item number: 64150
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 64150
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 5,91
£ 2,37
(Price per item)
price incl. 20% VAT, excl. delivery costs
GOC 40593760 PHILIPS 12972PRC1 Bulb, spotlight H7 12V 55W PX26d, 3200K, Halogen, Vision
Parts Details
  • Supplementary Info: Vision
  • Lamp Type: H7
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Packing Type: Box
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PX26d
  • PHILIPS: Bulb, spotlight
  • Item number: 12972PRC1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 12972PRC1
£ 6,54
(Price per item)
price incl. 20% VAT, excl. delivery costs

H7 bulbs for headlights and fog lights

H7 lamps

H7 components are single-filament headlight bulbs. This means that you will need to install two H7 light bulbs per headlight, one for each beam. The reflectors are positioned according to the filament in each bulb. If your vehicle is compatible, it will have two base plates per headlight.

Philips offers LED headlight bulbs compatible with H4 and H7 lamp sockets. An LED Philips bulb will last much longer than halogen lamps: the H4 components can last up to 50,000 hours while H7 bulbs can last up to 30,000 hours. They are also waterproof and consume less power.

What's the difference between H4 and H7 bulbs?

Car bulbs

It is not possible to replace a H4 bulb with a H7 one or vice versa as the differences are just two great. There are two main reasons why they aren’t interchangeable:

  1. The type of base plate is different, and so you can’t try to insert the bulb into a different bulb’s socket.
  2. The headlight reflectors are specifically designed to match the position of the bulb filaments. The positions are different for H4 and H7 bulbs, so it would affect the low and high light beams.

Top products related to this topic:

AUTODOC Bestsellers: parts at a good price

-64%
H15 OSRAM ORIGINAL LINE 64176 Bulb, spotlight H15 12V 55/15W PGJ23t-1, 3200K, Halogen
Parts Details
  • Product line: ORIGINAL LINE
  • Lamp Type: H15
  • Light Design: Halogen
  • Rated Power [W]: 55 / 15
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PGJ23t-1
  • OSRAM: Bulb, spotlight
  • Item number: 64176
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 64176
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 53,62
£ 18,91
(Price per item)
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HIR2 OSRAM ORIGINAL LINE 9012 Bulb, spotlight HIR2 12V 55W PX22d, 3200K, Halogen, ORIGINAL
Parts Details
  • Product line: ORIGINAL LINE
  • Supplementary Info: ORIGINAL
  • Lamp Type: HIR2
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PX22d
  • OSRAM: Bulb, spotlight
  • Item number: 9012
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 9012
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 36,39
£ 22,53
(Price per item)
price incl. 20% VAT, excl. delivery costs
-56%
GOC 36194030 PHILIPS LongLife EcoVision 12362LLECOC1 Bulb, spotlight H11 12V 55W PGJ19-2, 3000K, Halogen
Parts Details
  • Product line: LongLife EcoVision
  • Lamp Type: H11
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Packing Type: Box
  • Colour Temperature [K]: 3000
  • Socket Type bulb: PGJ19-2
  • PHILIPS: Bulb, spotlight
  • Item number: 12362LLECOC1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 12362LLECOC1
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 26,16
£ 11,37
(Price per item)
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H27W/1 OSRAM 880 Headlight bulb 12V, 27W, ORIGINAL
Parts Details
  • Lamp Type: H27W / 1
  • Voltage [V]: 12
  • Rated Power [W]: 27
  • Supplementary Info: ORIGINAL
  • Socket Type bulb: PG13
  • OSRAM: Headlight bulb
  • Item number: 880
  • Condition: New
Details
OSRAM Headlight bulb
Article number: 880
£ 6,82
(Price per item)
price incl. 20% VAT, excl. delivery costs
-60%
H7 OSRAM ORIGINAL LINE 64210-01B Bulb, spotlight H7 12V 55W PX26d, 3200K, Halogen
Parts Details
  • Product line: ORIGINAL LINE
  • Lamp Type: H7
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PX26d
  • OSRAM: Bulb, spotlight
  • Item number: 64210-01B
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 64210-01B
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 10,91
£ 4,30
(Price per item)
price incl. 20% VAT, excl. delivery costs
-38%
40607130 PHILIPS 12972PRB1 Bulb, spotlight H7 12V 55W PX26d, 3200K, Halogen, Vision
Parts Details
  • Supplementary Info: Vision
  • Lamp Type: H7
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Packing Type: Blister Pack
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PX26d
  • PHILIPS: Bulb, spotlight
  • Item number: 12972PRB1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 12972PRB1
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 10,46
£ 6,44
(Price per item)
price incl. 20% VAT, excl. delivery costs
D1S NARVA Xenon 84010 Bulb, spotlight D1S 85V 35W Pk32d-2, 4300K, Xenon
Parts Details
  • Product line: Xenon
  • Lamp Type: D1S
  • Light Design: Xenon
  • Rated Power [W]: 35
  • Voltage [V]: 85
  • Socket Type: Pk32d-2
  • Colour Temperature [K]: 4300
  • XenonLight: 1
  • NARVA: Bulb, spotlight
  • Item number: 84010
  • Condition: New
Details
NARVA Bulb, spotlight
Article number: 84010
£ 37,03
(Price per item)
price incl. 20% VAT, excl. delivery costs
HB3A OSRAM ORIGINAL 9005XS Bulb, spotlight HB3A 12V 60W P20d, 3200K, Halogen
Parts Details
  • Product line: ORIGINAL
  • Lamp Type: HB3A
  • Light Design: Halogen
  • Rated Power [W]: 60
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: P20d
  • OSRAM: Bulb, spotlight
  • Item number: 9005XS
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 9005XS
£ 9,52
(Price per item)
price incl. 20% VAT, excl. delivery costs
D1S HELLA 8GS 009 028-621 Headlight bulb 24, 12V, 35W
Parts Details
  • Lamp Type: D1S
  • Light Design: Xenon
  • Colour Temperature [K]: 5000
  • Voltage [V]: 24, 12
  • Rated Power [W]: 35
  • Socket Type bulb: Pk32d-2
  • Assy. / disassy. by qualified personnel required!
  • XenonLight: 1
  • HELLA: Headlight bulb
  • Item number: 8GS 009 028-621
  • Condition: New
Details
HELLA Headlight bulb
Article number: 8GS 009 028-621
£ 50,74
(Price per item)
price incl. 20% VAT, excl. delivery costs
S 2 HELLA 8GD 002 084-131 Headlight bulb 12V, 35/35W
Parts Details
  • Lamp Type: S2
  • Light Design: Halogen
  • Packing Type: Box
  • Voltage [V]: 12
  • Rated Power [W]: 35 / 35
  • Registration Type: ECE approved
  • Socket Type bulb: BA20d
  • Assy. / disassy. by qualified personnel required!
  • HELLA: Headlight bulb
  • Item number: 8GD 002 084-131
  • Condition: New
Details
HELLA Headlight bulb
Article number: 8GD 002 084-131
£ 3,51
(Price per item)
price incl. 20% VAT, excl. delivery costs
R2 OSRAM ORIGINAL 64183 Bulb, spotlight R2 (Bilux) 12V 45/40W P45t, 3200K, Halogen
Parts Details
  • Product line: ORIGINAL
  • Lamp Type: R2 (Bilux)
  • Light Design: Halogen
  • Rated Power [W]: 45 / 40
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: P45t
  • OSRAM: Bulb, spotlight
  • Item number: 64183
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 64183
£ 4,62
(Price per item)
price incl. 20% VAT, excl. delivery costs
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GOC 37713233 PHILIPS Xenon X-tremeVision gen2 42403XV2S1 Bulb, spotlight D3S 42V 35W PK32d-5, 4800K, Xenon
Parts Details
  • Product line: Xenon X-tremeVision gen2
  • Lamp Type: D3S
  • Light Design: Xenon
  • Rated Power [W]: 35
  • Voltage [V]: 42
  • Packing Type: Box
  • Colour Temperature [K]: 4800
  • Socket Type bulb: PK32d-5
  • XenonLight: 1
  • PHILIPS: Bulb, spotlight
  • Item number: 42403XV2S1
  • Condition: New
Details
PHILIPS Bulb, spotlight
Article number: 42403XV2S1
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 104,69
£ 86,85
(Price per item)
price incl. 20% VAT, excl. delivery costs
-52%
D8S OSRAM XENARC ORIGINAL 66548 Bulb, spotlight D8S 42V 25W PK32d-1, 4500K, Xenon
Parts Details
  • Product line: XENARC ORIGINAL
  • Lamp Type: D8S
  • Light Design: Xenon
  • Rated Power [W]: 25
  • Voltage [V]: 42
  • Colour Temperature [K]: 4500
  • Socket Type bulb: PK32d-1
  • XenonLight: 1
  • OSRAM: Bulb, spotlight
  • Item number: 66548
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 66548
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 126,65
£ 59,65
(Price per item)
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Blister 1pcs - 1 987 3 BOSCH 1 987 302 071 Bulb, spotlight H7 12V 55W PX26d, 4000K, Halogen
Parts Details
  • Lamp Type: H7
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Colour Temperature [K]: 4000
  • Socket Type bulb: PX26d
  • BOSCH: Bulb, spotlight
  • Item number: 1 987 302 071
  • Condition: New
Details
BOSCH Bulb, spotlight
Article number: 1 987 302 071
£ 3,97
(Price per item)
price incl. 20% VAT, excl. delivery costs
-67%
H7 OSRAM ULTRA LIFE 64210ULT Bulb, spotlight H7 12V 55W PX26d, 3200K, Halogen
Parts Details
  • Product line: ULTRA LIFE
  • Lamp Type: H7
  • Light Design: Halogen
  • Rated Power [W]: 55
  • Voltage [V]: 12
  • Colour Temperature [K]: 3200
  • Socket Type bulb: PX26d
  • OSRAM: Bulb, spotlight
  • Item number: 64210ULT
  • Condition: New
Details
OSRAM Bulb, spotlight
Article number: 64210ULT
RRP

RRP is the recommended retail price set by the manufacturer or importer of the product and provided by the manufacturer, supplier or retailer. AUTODOC displays the RRP (VAT incl.) for a product if it has been received from at least one supplier or another source that has such information.

£ 13,64
£ 4,45
(Price per item)
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