On the outside, there is absolutely no difference between H4 and 9003. Both share the same housing, the same dual-filament internals, and the same three-pronged connection. So, of course, they are interchangeable, i.e., installing a 9003 bulb in a vehicle equipped with H4s, and vice-versa.
What bulb is the same as 9003?
As earlier 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.
Are all H4 bulbs the same?
Since different bulb types have different fittings, they aren’t interchangeable. If your vehicle requires H4 bulbs, you can’t simply switch to another bulb fitting. The only exception is the HB2 or 9003 bulb, which are identical to H4 bulbs.
What does H4 bulb mean?
H4 lamps used to be the standard light sources in vehicles. These are the so-called bilux lamps. This simply means that there are two filaments in the bulb: one for the low beam and one for the high beam.
What bulb is the same as H4?
The H4, HB2, and 9003 are essentially all the same bulb and can be used interchangeably.
What is the difference between H4 and HB4?
Cars that use single filament need one bulb for the main and another for the dipped. H1, H3, H7, H11, HB3, and HB4 bulbs are single filament. H4 are dual filament.
What does Sylvania 9003 fit?
Amazon.com: SYLVANIA 9003 (also fits H4) Basic Halogen Headlight Bulb, (Contains 1 Bulb) : Automotive.
What do H4 bulbs fit?
The H4 model has a slightly shorter tab, but an H4 bulb will fit into a 9003 socket. However, a 9003 bulb might not fit perfectly into an H4 socket.
What is the difference between a 9003 and 9005 bulb?
9005 have a higher lumins in high beam. 9003 have a higher lumens than 9007. 9004 have the lowest. Lumens=light output.
Can I use 100w bulb instead of 55w?
When should I use High Power Bulbs? OK so let’s recap, higher wattage bulbs are not road legal. They will also last a lot less time than a 55W bulb. Therefore you should not be using them for normal driving.
Can I put 55w bulb?
There are no legitimate 55w automotive HID systems; all legitimate HID headlamps are 25w or 35w systems. Installing a 55w ballast or a “55w bulb” will make your headlamps dangerous to yourself and everyone you share the road with. Don’t do it.
Can you replace 55w bulbs with 60w?
The vast majority of wiring systems should be able to cope with uprating 35/35w bulbs to 55/60w bulbs without any problem.
References:
- https://rxmechanic.com/h4-vs-9003/
- https://www.powerbulbs.com/blog/2019/09/what-is-an-h4-bulb
- https://www.hella-bulbs.com/en/article/h4-vs-h7
- https://www.powerbulbs.com/us/blog/2019/09/what-is-an-h4-bulb
- https://www.powerbulbs.com/us/blog/2020/05/headlight-bulb-fittings
- https://www.amazon.com/SYLVANIA-Basic-Halogen-Headlight-Contains/dp/B000BLKV8O
- https://mycarmakesnoise.com/headlights/9003-headlight-bulb-guide/
- https://maxima.org/forums/5th-generation-maxima-2000-2003/17674-what-diffs-between-h4-s-9005-s.html
- https://www.autobulbsdirect.co.uk/blog/power-bulbs/
- https://www.candlepowerforums.com/threads/swap-out-35w-hid-bulb-for-55w-bulb-using-same-ballast.407512/
- https://www.motorcyclenews.com/new-rider/choosing-kit/2010/february/feb0110-change-headlight-bulbs-from-35w-to-55w-/