🚀 go-pugleaf

In article <1369@hudson.acc.virginia.edu> smf7s@hudson.acc.virginia.edu (friedman steven michael) writes:
>incandescent lights, but use a lot of power during start-up; whereas
>it costs nothing to flip an incandescent bulb on and off, but is more
>expensive to run over time.  My question is where do the efficiency
>curves meet?  That is, how long does one need to keep a light on
>continuously before it becomes more efficient to switch from

	What I've heard is that it's not so much the start-up cost, but
the wear on the tube from switching it on/off, versus the cost of the
power it uses.  About 7 years ago, I was told that flourescents should
not be turned off if they're going to be used in the next hour (that
was for a room full:  I'm assuming this scales...therefore it should be the
same for fewer lamps of the same wattage (40) ).  Anyone know about
sodium/mercury vapor?

							Anand.