I am collecting parts for my inevitable 12 Volt conversion on my 1952 Chevy truck. 
As nostalgic as those 6 Volt dim head lights may be, here in the Northwest, good lights are a must. Safety First, you know...

I had these from a previous life in my Volvo days.

Great quality reflector, but the lens is way too flat for the sexy round look of the truck.

In an effort to keep with the traditional bulbous look, I would need to stay with the rounded look of vintage head lights.

I found these French made units at the swap meet. I like the unusual fluting, but they had an old rusted reflector, and it uses an old style incandescent bulb.

So what is a hot rodder to do??  Re-reflect of course...

First I pried the flange open, only using the flat part of the knife as leverage against the glass. A wise man once said: "Glass is very strong, until it breaks" 
Such wisdom is hard to find these days.

Then using a needle nose pliers, I carefully folded the edge back.

One cool French lens to go...

Blasphemy ?? !! Yeah, probably, if you restoring 1969 Volvos, but we are not... A shallow tap broke the lens.

I held the lens inside a paper bag, and used eye protection.

Then I just peeled off the glass and cleaned up the edge.

A very light brush to remove any glass debris before assembly. Do not touch the lens with your fingers.

This Swedish made Hella reflector is of a very high quality, allthought I doubt they make them in Sweden anymore.

Using an epoxy adhesive, I just added the lens to the reflector.

I can now use any caliber H4 bulb, but still look cool. 

The best of both worlds, vintage style, but great output.

Now if you excuse me, I have to go and look for a 12V generator.