The same thing happened to us... We had a 160W PowerSun that just snuffed out on us after just a few months. Really infuriating considering what we paid for the damn thing, with the supposed guarantee that it lasts three years.
One thing we did notice is that the lamp always seemed to be rather argumentative when using that bulb. Sometimes, the light would go out if you so much as touched the lamp, then it would suddenly come back on for no reason. Or sometimes, you'd flick the switch on but it would take a few seconds for the light to come on. This only happened when using the PowerSun bulbs (we had two) and would happen with both basking lamps we had (same brand lamps, though), but would never happen with regular bulbs. We wonder if it's because the maximum capacity for the lamp was 150W and the PowerSun was a 160W, yet you see the lamps being sold with the claim that you can use them with the high-wattage PowerSuns. Go figure...
If I were in your position, I would not wait until Saturday and go ahead and get him a regular bulb until you can get him a UV bulb, so he can at least have proper temps. In the meantime, you might want to look into the reason why your bulb died prematurely, so you don't end up shelling out another $40 for a bulb that will die just like the last one. We will probably look into getting another lamp before trying to put the other PowerSun in there. For now, we have a regular bulb.
Hope this helps! Sorry about the length. I seem to have diarrhea of the mouth this evening. LOL
Julie, Justin and Frasier the Veiled. 