Also theres no breaker just the main & the box with the screw in fuses. When the fuses are overloaded the spring breaks in the fuse breaks & the fuse blows. Thats why i get stressed about overloading and starting fire. But if 20 amp can handle 250 w light & couple fans then i should be good.I was told you can run 14 100 watt light bulbs of a 15 amp circuit. What wire is used for the outlet? is the wire white or yellow, white wire is for 15amp outlets and yellow wire is for 20 amp outlets. What plug is the timer plugged into is it a 15 or 20 amp outlet. If you know you have a 20 amp plug and yellow wire from the outlet to the breaker panel you probably would be safe but if its a 15amp circuit with 15amp outlet and white wire I would be scared of starting a fire. But like the other person said you will probably trip the breaker if its a 15 amp circuit.