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Old 18-10-2020, 06:48 PM   #1
thebiglebowski0
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Default Best headlight bulb upgrade

Hey dudes, I’m after some enlightenment (ahem). Can anybody recommend upgraded headlight bulbs H4 fittings for a ‘73 bug. LED or Halogen? Additional modifications recommended or needed? I do a lot of night driving on badly lit/unlit country roads and am after as bright as possible.

Cheers groovers

looking forward to some illuminating responses (sorry, &#x1f600.
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Old 18-10-2020, 08:07 PM   #2
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Do a search it's been asked many times , main thing is to check what voltage you are getting at back of bulb with engine running
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Old 18-10-2020, 08:47 PM   #3
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Replaced ours to 90/110w, replaced earths, H4 plastic connectors and used uprated relay.

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Old 18-10-2020, 08:54 PM   #4
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engine running:
back probe the lamps and see what voltage you have
check the battery voltage
difference is what you are losing through the wiring
then check lamp -ve to battery -ve -> that's the voltage lost through earthing
then lamp +ve to battery +ve -> that's the voltage lost through the switches

earth can be fixed pretty easily - just check the wire and where it screws to the body
if i had a big loss through the switches i'd add a new feed from the battery and a relay or relays

as an example my t4 had 13.5V at the battery and only 12.2V at the lamps. i was losing 1.2V between the battery +ve and lamp, so i bought a relay kit that gave me the full battery 13.5v and the difference was huge.

once you have reasonable voltage than add some +150% bulbs
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Old 18-10-2020, 09:29 PM   #5
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Quote:
Originally Posted by thebiglebowski0 View Post
Hey dudes, Iím after some enlightenment (ahem). Can anybody recommend upgraded headlight bulbs H4 fittings for a Ď73 bug. LED or Halogen? Additional modifications recommended or needed? I do a lot of night driving on badly lit/unlit country roads and am after as bright as possible.

Cheers groovers

looking forward to some illuminating responses (sorry, &#x1f600.
Once you have ascertained that you donít have a voltage drop at the headlamps, the best H4 bulbs are Osram Night Breaker laser.

Phil
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Old 18-10-2020, 09:43 PM   #6
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Best mod I’ve ever done, swapped the standard headlights for H4 sealed beams with Philips white vision xenon effect lamps.
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Old 18-10-2020, 10:00 PM   #7
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Only thing I can add is that the reflector bowls must be spot on bright and shiny. You should be able to see your reflection as sharp as in a mirror. If it looks like it's dull or foggy in the reflector then no amount of voltage increase or higher wattage super duper bulbs will give you decent driving lights.


This is because the dullness will scatter the light in all directions, rather than focusing it on the road where it's needed.



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Old 18-10-2020, 10:11 PM   #8
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Another positive for Osram Night Breakers. I have them in my Land-Rover along with Wipac Crystal light units. They’re very good indeed.
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Old 18-10-2020, 11:08 PM   #9
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Depends on what current headlight you have. Semi sealed or separate reflector and lense units.
Semi sealed is easy as so long as reflector still good n shiny then whack in a good aftermarket halogen bulb.
For the old skool reflector then the reflector is the main item to address. Needs to be like a mirror. If not then no amount of wattage will make the output of the reflector much better. If the reflectors OK then a H4 bulb that has the older base plate design, P45 or P45t (can never remember which one)

Last choice is as I believe the Beetle headlights are 7 inch then you could upgrade to a quality LED headlight unit
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Old 19-10-2020, 08:55 AM   #10
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I keep forgetting about the reflectors - yes, check these.

I am very tempted by LEDs. They're expensive and an acquired taste but the extra light and reducing load on the wiring probably outweighs the aesthetics for me

I've not seen a full kit for beetles so you'd probably have to cobble something together to mount them. It looks like LR defender headlamp rings could work, but I'm a long way from worrying about lighting on my car
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