What do the grooves and bumps on a headlight lens do ???

Posted by Alberta Mike on June 12, 2001 at 09:41:30 from (24.65.156.254):

I was putting in the lenses on tractor headlights last night and I thought someone would know exactly why the inside of the lens is rippled with grooves, etc. Also noticed that the lens is marked "top" on the outside of the lens. Do the ripples or grooves magnify or redirect the light somehow? And why is there a topside indicated?

Follow Ups:

• Re: What do the grooves and bumps on a headlight lens do ??? tim 19:23:58 06/12/01 (1)
  • Re: Re: What do the grooves and bumps on a headlight lens do ??? Alberta Mike 20:53:11 06/12/01 (0)
• Re: What do the grooves and bumps on a headlight lens do ??? Dave T 12:21:27 06/12/01 (0)
• Re: What do the grooves and bumps on a headlight lens do ??? Dave T 12:18:22 06/12/01 (0)
• Re: What do the grooves and bumps on a headlight lens do ??? Jim WI 10:14:02 06/12/01 (2)
  • Re: Re: What do the grooves and bumps on a headlight lens do ??? TomH 18:09:24 06/12/01 (1)
    • Re: Re: Re: What do the grooves and bumps on a headlight lens do ??? Dave t 19:18:57 06/12/01 (0)

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