my lights came off in my house today.

Running a 600w hps I was running it today then all of sudden my living room lights came off for a lil. Called the electric company the guy said the breaker might be getting to hot.. I was thinking should I just run the light at night when everybody sleep

Try to find out what else is on the same circuit as the light and then dont use those things during
You can try turning off breakers to see what turns off in the house.

Hopefully thats all it is. Still the wiring might be a little iffy. Look at the main box for anything melted.