On 8/14/2008 8:23 PM Mike spake thus:

I just installed some 4" recessed cans in a remodeled bathroom and am
choosing bulbs.

The Halo trim kits say that the max bulb wattage is a 50 Watt PAR20 or
a 50 Watt R20.

So, I have a halogen bulb (an R20) that says "40 Watt = 75 Watt" which
appears to be saying that this halogen bulb uses 40 Watt of
electricity to produce light that is equivalent (in some sense) to a
75 Watt incandescent.

Question: is this R20 bulb ok for my 4" can? I think it is and in
fact is slightly undersized since the trim kit allows a 50 Watt R20
and my R20 is only 40 Watt. Is that right? I probably should just
ignore the incandescent comparison but I want to make sure.

Since the size recommendation applies to power consumed by the bulb, not
equivalent light output, you should be just fine with the 40/75 w bulb.


--
"In 1964 Barry Goldwater declared: 'Elect me president, and I
will bomb the cities of Vietnam, defoliate the jungles, herd the
population into concentration camps and turn the country into a
wasteland.' But Lyndon Johnson said: 'No! No! No! Don't you dare do
that. Let ME do it.'"

- Characterization (paraphrased) of the 1964 Goldwater/Johnson
presidential race by Professor Irwin Corey, "The World's Foremost
Authority".