I bought this 100Wa daytime heat lamp about a week ago. Today I had it running for about 8 hours, I turned it off for one hour, I turned it back on for one hour and it exploded when I wasn't in the room. Three days ago my 75W night lamp that I purchased at the same time as last week stopped working out of the blue. I took it back and exchanged it but I'm worried it might be an electrical problem and I don't want my apartment to catch fire. Have you had any bulbs explode?