Hey, thanks Grim and Buster...

So I hit Home Depot before they closed and grabbed a 70w MH and a 70w HPS. I only had time to rip apart one old lamp for it's cord so far, but I got the HPS wired. I plugged it in outside my grow room to test the temp and was surprised to find that the housing remains COOL. The glass front that covers the bulb only gets moderately hot right at the bulb. I switched all my fans up one notch, so I shouldn't see a temp spike.

The box claims the HPS is the same brightness as 375w incandescent and the bulb is rated to last 24,000 hrs.

These are security lights, with photocells, so I'll have to cover the sensor with a piece of foil, I suppose.

I got it in just as the timer went OFF. This is flower day 30. Okay now for the MH....