when I did this could not find the R40 bulb. Instead use a Sylvania 200Watt bulb
#S488. I have it inside a small aluminum cone and have the lamp attached to a pulley on the ceiling for convenience if I need to raise or lower the bulb. So far I have it set at 37 inches and it works perfectly. Times range from about 25-50 seconds for grade #2. Hope this helps....(also gives a great suntan)
There is also the option of using a conditioning power supply for a computer. I have been using a TrippLite backup/filtering/conditioning supply for over a decade. The voltage coming out is regulated by continuously switching between transformer taps. As the voltage fluctuates, I hear the relays clicking. It takes quite a voltage jump for it to switch over to the battery backup.
Originally Posted by bobherbst