Theplug on H4 lights are basically a male version present on the bulb directly compatible with the ones inside the headlight assembly. Makes it a drop in replacement to swap the lights In the pic below you can see the sizes perfect and a drop in replacement for the existing bulb.
9003and H4 bulbs look quite similar on the outside, and in some forums, you'll read that they are the same, while on others that they are different. So,
No that page/procedure does not involve P45t (R2) bulbs at all. It involves a 45/45-watt variant of the H4 bulb used by Honda in some of their US/Canada-market motorcycles. The base is identical to a regular H4 bulb's P43t base, except the tabs are placed differently around the circumference. That's nothing like the situation with P45t
Forexample, an H1 and an H7 bulb may look the same in terms of light output, but an H7 bulb won't fit into a socket for an H1 bulb. In terms of convenience, though, the H4 bulb stands out above virtually all other bulbs available on the market. The pros of using this bulb include: The light is very bright; It's relatively inexpensive; It's
The9007 and H4 bulbs are two types of headlight bulbs. The main difference between the two is that the 9007 is a low beam bulb and the H4 is a high beam bulb. The H4 bulbs are brighter than the 9007 bulbs, so they are better for use in foggy or dark conditions. The 9007 bulbs are better for use in daytime conditions. Back to top. Thesebulbs are also known as the h-series, which all have the same base size of 11mm. H11 Bulb . H11 Bulb is a type of high-intensity discharge lamp that is used primarily in industrial lighting, but also as an outdoor security light and in indoor decorative accent lighting. H11 Bulbs have a cleaner high-beam light compared to H4 bulbs
AnH7 bulb – along with other halogen bulbs such as H1, H3, H4 etc – indicates the type of fitting. H7 bulbs tend to be used for dipped – or low – beam, while H1 bulbs can be high or dipped beam, depending on output. Other H-rated bulbs can be used for fog lights and indicators – your Haynes Manual will tell you which bulbs your car

Recentlyawarded the Auto Express Recommended 2022 award for the 9003 (HB2/H4) fitment! Read a review vs the Philips WhiteVision Ultra. Philips X-tremeVision Pro150. OSRAM NIGHT BREAKER 200. There are a selection of Xenon bulbs that are road legal but not all, so please check and consider this when purchasing your bulbs –

Whenlooking at the patterns produced by LED H4 bulbs in reflector housings, the best performing models are clearly within the range needed to perform in parity with halogen bulbs. In some applications (reflectors), the level of output might need to be lower all the same, but a lower output LED would be a much lower net energy consumer
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  • are all h4 bulbs the same