I have four tanks in my house for my herps (a 40gal breeder, a 55 gal, and 2 15gal). All four have over the tank lamps. I also have two cats who absolutely love to sit on the tanks. The only one they have ever knocked a lamp off of is a crested gecko tank and it isn't a heat lamp. We had a house fire when I was 13 and fire is my only fear in life, so I have been concerned about it.