> Good point, have you made up a handy chart of incandescent watts vs
> lumens? ;)
There isn't one. That is, there isn't _one_, though there may be many.
There is a general industry average for commodity bulbs, because there is a
general industry _lifetime_ rating. Lots of variability, though. And the
technology (halogen, not) makes a fair difference, too. Consider the
old-fashioned photoflood lamp. Lots of lumens per watt. Lasts what, a
couple of hours?
There's a bazillion ways to rate a lamp. Cost. Lifetime. Light output.
Light _pattern_. Spectrum. Power consumption. Heat output.
Environmental sensitivity (heat/cold, vibration, orientation, even
EMI/ESD). Physical durability. Size/shape. Hazards if damaged...
Depending on your needs, you might even care about _all_ of these!
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