TheH4 bulb, with its dual filaments, has a particular placement for both high and low beams. The H7, being a single-beam bulb, has its filament positioned differently. The reflectors and lenses in the headlight housing are engineered to focus the light emitted by the filament at a specific point. If you try to use an H7 bulb in place of an H4Youshould use a real H4 bulb in an H4 reflector. No LED or HID conversion works the same, because the light source is shaped differently from the H4 filament. IMHO the best headlight conversion, bar none, is the Cibie H4 E-code reflector and 80/100w H4 bulbs, in a relay wiring harness that runs the bulbs straight from the battery. Alumen is a measure of the total amount of visible light emitted by a source. The higher the lumen rating, the brighter the light. An H7 halogen bulb typically has a lumen rating of around 1500 lumens, while an H7 LED bulb can have a rating of up to 4000 lumens. This means that the H7 LED bulb is significantly brighter than the H7 halogen Eventhough these bulbs are in the same category, they're not interchangeable. H1, H3, H7, H11, HB3, and HB4 bulbs are single filament. H4 are dual filament. Nominal power. For the most part, these fittings all produce the same amount of light, but the number of volts they require and watts they produce (also called nominal Asa result, an alternative bulb called the HB2 or 9003 was developed. This can be rather confusing for consumers. The H4, HB2, and 9003 are essentially all the same bulb and can be used interchangeably. Many bulbs that fit this specification will feature all three labels on the packaging. Halogen v LED. H4 bulbs are available in both halogen Notrelevant, but in the same box I found a whole bunch of the HIR bulbs; but they are all single filaments. The Osram are probably something I bought by mistake when working to upgrade an old Honda with the HIR bulbs. it's the name Osram has applied to all its H4 bulbs, no matter what variety, and all the tungsten R2 bulbs before the H4
Asearlier mentioned, the 9003 bulb is almost the same as the H4. However, the two are slightly different, more so in the area of use. As previously hinted, the 9003 bulbs came into the scene to take the role of the H4, which had restrictions. H10 and 9005 halogen/incandescent light bulbs all use the same style of base but each one is
Afterreplacing several single filament bulbs on my car, at least once a year, give me the old type ones any day. Even top brand name bulbs don't seem to last longer. Over voltage and vibration are common culprit for shorter life, more common on motorcycles, cars fitted with the h4 as standard should be devoid of these problems.
Oneof the main differences between the H9 and H11 bulbs is their size and shape. The H9 bulb has a length of 2.56 inches and a diameter of 0.94 inches, while the H11 bulb has a length of 2.75 inches and a diameter of 1 inch. This means that the H11 bulb is slightly longer and wider than the H9 bulb, which can make it more difficult to install
1SEALIGHT® X1 H4/9003/HB2 White LED Headlight Bulbs 2Pcs. 2 SEALIGHT® L1 H4/9003/HB2 White LED Headlight Bulb 2Pcs. 3 Torchbeam® T2 H4/9003/HB2 White LED Headlight Bulb 2Pcs. 4 ZonCar® H4/9003 White LED Bulb 2Pcs. 5 Marsauto® M2 H4/9003/HB2 High/Low Beam LED Bulb 2Pcs.
DippedBeam - 472 H4 Headlight Bulbs Main Beam - 472 H4 Headlight Bulbs Front Fog - 711 H11 Headlight Bulbs Side Light - 501 Capless Facelift Fiesta Mk7 (same bulbs as above with the following exceptions) DRL's/Main Beam - H15. I believe this list of bulbs to be correct. I am of course open to corrections also if anyone would like to ga1KqZ.