Yes ATT has a modem with built in wifi so its all wireless. Sucks cause everytime I wanna use my internet when lights are on I have to unplug my 600w. Hopefully I can find someone to trade me my lumatek 600w 110v for there 220v. Should I be worried about fire issues?its all wireless, am i correct? if so than they might be on the same frequency, this is the only thing i can think of other than electrical issues. if the 220 and 110 are on different breakers than it shouldnt be a problem. a 1000 watt light takes an average of 13 amps to start, and a 600 watt takes around 9 with the average breaker being 15 amps but it doesn't sound like you blew a breaker because it just started working again......