Replacement high-beam bulbs - Page 2
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  1. #21
    Senior member OBC John's Avatar
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    Seems I'm on a learning curve here. What are the "drivers" for? The CREE led bulbs I have on order just clearly replace the H7 bulbs and connect in exactly the same way. Yet those fan-cooled thingies need a driver. Why?

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  3. #22
    Rampant Member Statler's Avatar
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    John
    Most LED bulbs come with some sort of external driver/ballast to control them. It stops the lamp triggering the lamp fail routine in the canbus software and also allows them to be 'quiet' so as not ot interfere with the radio/audio system

    Putting the driver in the lamp may cause it to overheat and fail.

    That's my understanding of it anyway, any LED bulbs I've bought have had them.
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  4. #23
    Senior member OBC John's Avatar
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    Thanks Steve. But I still don't get why these . . . .

    untitled.png

    DON'T need/have a "driver" but these . . . .

    Fan.png

    clearly DO.

    What is the difference?
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  6. #24
    Rampant Member Statler's Avatar
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    It's to do with the actual LED type used in the lamp.
    It think the Cree need them due to their higher output. The ballast maintains linear power delivery. The fan cools the lamp unit.
    If you combine them then it becomes too big for the headlamp.

    I bought some less bright LED lamps for the eldest's Corsa sidelamps and they had no control/ballast but weren't Cree LED.
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  7. #25
    Senior member OBC John's Avatar
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    I replaced my sidelights some time back . . . with CREE LEDs. 😏. (confused.com)

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  8. #26
    Senior member Gav's Avatar
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    There will be electronics (driver) in the base of that h7 John, unless they're wired led in series.
    Normally you need a constant current driver for controlling a string of LED's which is what will be in the other bulbs.
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  9. #27
    Senior member Gav's Avatar
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    Quote Originally Posted by OBC John View Post
    I replaced my sidelights some time back . . . with CREE LEDs. . (confused.com)

    Sent from my Nexus 10 and a Black XF-S
    This will be a series of Cree LED and low power so don't need a driver. They will probably be some rudimental electronics just after the contacts of the 5w5 wedge bulbs
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  10. #28
    Very Active Member Richard Y's Avatar
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    I find all this so confusing, I have bought an HID kit with ballast and I understand that, for the dipped beam, however....I tried cutting the wires, threading through the bulb retaining clip, and crimping the wires........it didn't work after that, so I assume it of the HID bulbs. So I bought another set of bulbs and a be something to do with the voltage or frequency pair of the ebay metal clips with the slot in, seen elsewhere in this thread. I could not get the clips to engage and lock the bulbs in. So I gave up .......Ive not even thought about the LED bulbs I bought for the main beam which are fan cooled type with one large LED on one surface & have no ballast.

  11. #29
    Senior member OBC John's Avatar
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    Well, I've decided to try these initially (because I've ordered them and are on their way).

    uploadfromtaptalk1483992867395.jpg

    If they're bright enough, great. If not I'll consider the fan-cooled ones.

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  12. #30
    Super Moderator D3GGY's Avatar
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    Quote Originally Posted by Richard Y View Post
    I find all this so confusing, I have bought an HID kit with ballast and I understand that, for the dipped beam, however....I tried cutting the wires, threading through the bulb retaining clip, and crimping the wires........it didn't work after that, so I assume it of the HID bulbs. So I bought another set of bulbs and a be something to do with the voltage or frequency pair of the ebay metal clips with the slot in, seen elsewhere in this thread. I could not get the clips to engage and lock the bulbs in. So I gave up .......Ive not even thought about the LED bulbs I bought for the main beam which are fan cooled type with one large LED on one surface & have no ballast.
    Cutting and splicing HID wires isn't recommended as they are HT leads running 6000 and 21000v (some vary) but all run very high voltages to start and run the bulbs.

    You need to buy special clips or modify your existing to get them to fit.
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  13. #31
    Very Active Member Richard Y's Avatar
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    Quote Originally Posted by D3GGY View Post
    Cutting and splicing HID wires isn't recommended as they are HT leads running 6000 and 21000v (some vary) but all run very high voltages to start and run the bulbs.

    You need to buy special clips or modify your existing to get them to fit.
    I'm reluctant to cut the original clips, and I have bought the clips with the slot in from ebay, but I just cannot make them fit properly

    Its a shame Sunday club is so far away. I'm in Braintree in Essex.

  14. #32
    Super Moderator D3GGY's Avatar
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    Quote Originally Posted by Richard Y View Post
    I'm reluctant to cut the original clips, and I have bought the clips with the slot in from ebay, but I just cannot make them fit properly

    Its a shame Sunday club is so far away. I'm in Braintree in Essex.
    People have come from further away, GunGrave came from Holland
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  15. #33
    Prodigious Member casperxfs's Avatar
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    Quote Originally Posted by hulubei View Post
    Second link (for the HID) not working.
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  16. #34
    Senior member OBC John's Avatar
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    The CREE LED bulbs arrived yesterday so I went out and swapped them at lunchtime. This is the view mid-swap. Not so obvious on the photo but the difference is chalk and cheese. I'll try them out on a dark road this evening and if they're at least as good (!) as the halogen bulbs I shall look no further. (There's a pun in there somewhere . . . )

    LED v Halogen.jpg
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  17. #35
    Rampant Member Philayl's Avatar
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    Hi John, was it a straight swap? Phil
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  18. #36
    Super Moderator D3GGY's Avatar
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    Quote Originally Posted by OBC John View Post
    The CREE LED bulbs arrived yesterday so I went out and swapped them at lunchtime. This is the view mid-swap. Not so obvious on the photo but the difference is chalk and cheese. I'll try them out on a dark road this evening and if they're at least as good (!) as the halogen bulbs I shall look no further. (There's a pun in there somewhere . . . )

    LED v Halogen.jpg
    John, from experience, but I stand to be corrected, they will look fine now but will be useless in the dark.
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  19. #37
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    Sorry for the off-topic but I'm wondering this for a long time. My car has halogen bulbs in the specs and I can't find anything like a HID aftermarket ballast near the lamps. Still, they dipped beam fade next second after start and then light up back normal. It's a like a flash when starting. They are also blue-whitish. Might be retrofit with Xenon? How should I check it without dismounting the lamp and check inside?

  20. #38
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    Quote Originally Posted by OBC John View Post
    The CREE LED bulbs arrived yesterday so I went out and swapped them at lunchtime. This is the view mid-swap. Not so obvious on the photo but the difference is chalk and cheese. I'll try them out on a dark road this evening and if they're at least as good (!) as the halogen bulbs I shall look no further. (There's a pun in there somewhere . . . )

    LED v Halogen.jpg
    I've experienced two times the T5/W5W with CREE first and COB secondly in the Jag and my fathers BMW. Each of them died or started blinking after a couple of weeks. I don't trust Chinese LED anymore. Off course, Osram OEM LED are running fine in other cars.

  21. #39
    Super Moderator D3GGY's Avatar
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    Quote Originally Posted by hulubei View Post
    Sorry for the off-topic but I'm wondering this for a long time. My car has halogen bulbs in the specs and I can't find anything like a HID aftermarket ballast near the lamps. Still, they dipped beam fade next second after start and then light up back normal. It's a like a flash when starting. They are also blue-whitish. Might be retrofit with Xenon? How should I check it without dismounting the lamp and check inside?
    The ballasts are screwed to the headlight o the underside. Halogen bulbs don't need ballast though.
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  22. #40
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    So without dismounting the headlight, no clue. Thanks for confirmation about the ballast location.


 

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