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Quote:
Originally Posted by MikeK
Badpuppy,
Thank you for starting this thread and posting that wonderful list of Model A lamps! Sorry if things went a little off-track from original lamps because of my comments.
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Thank YOU Mike, for posting the SAE data. Good information, could have saved me some arithmetic.
Light emitted from the parabolic focus produces parallel rays off the reflector. Moving the bulb forward from that point condenses the beam to form a conic, the nexus of which should be set at 25 feet forward. Per instructions this is accomplished with lenses in place, perhaps to avoid scorching the far wall.