Quote:
Originally Posted by 406CID
Folks keep asking about focus, so I got Squeaky Betsy out in the cold misty rain for a quick demo tonight. Her headlights are not aligned correctly, so please don't beat me over the head about that. Hopefully the short video demonstrates the fact that the LED bulbs are focusable.
https://youtu.be/3rIEO9QFRQE
-Kyle |
Thanks for the video, Kyle, it's informative.
I see two minor problems with this bulb, perhaps one major:
1. The light source(s) are spread out on both sides of the centered tongue, which means there's no way to focus into a tight spot of light like could be done with a filament bulb with the lens removed. However, a reasonable focus should be possible by going for the smallest, brightest spot on the far wall (with lens installed). I suspect this would be more difficult than with standard bulbs.
2. Your vid shows the beam lowering as you adjust the focus screw in your Twolite lamps, which is caused by the 1/16" offset of the socket sleeve in the reflectors. Because both sides of the tongue have to be lit for high beam, the overall light source is 1/16" above where it should be. This is not terrible, so long as you readjust the beam height after focusing.
3. Despite the claims, I don't believe these bulbs are compatible with vehicles manufactured before March 1929. FSB p.573 lists the authorized bulbs available at the time, and clearly states that fact. Fig.738, p.362 shows an H-type lamp with a later reflector installed, and illustrates the reason why - the socket contacts are vertical.