TBrogden
Newly Enlightened
All,
Are there any formulae or rules of thumb for "re-rating" of incandescent bulbs? I'm finding that Welch Allyn's website doesn't offer re-rating for all its bulbs and, even when it does provide that info, it doesn't extend to voltages in which interested.
Also, I often see here in the forums that torch lumens have been calculated at 65% of bulb lumens. If not too much trouble, I would very much like to know how that number was derived and the weighted contributions of those things making up the 35% "loss".
Many thanks,
Tony
Are there any formulae or rules of thumb for "re-rating" of incandescent bulbs? I'm finding that Welch Allyn's website doesn't offer re-rating for all its bulbs and, even when it does provide that info, it doesn't extend to voltages in which interested.
Also, I often see here in the forums that torch lumens have been calculated at 65% of bulb lumens. If not too much trouble, I would very much like to know how that number was derived and the weighted contributions of those things making up the 35% "loss".
Many thanks,
Tony