I have a couple thoughts:

~ CFLs wouldn't cause a power outage for your house. They just don't have enough power to do that. Especially since the power outage didn't occur until 10 minutes later.

~ My first guess was that you just blew a fuse (your security light and grow lights are on the same circuit, and it got overloaded). But if that were the case, you would have had to reset it at the fuse box; the power company wouldn't have been able to do that over the phone.

~ My second thought is that there was a random power surge/outage at your house (and maybe some of your neighbors' too, you could ask if you ever see them) that coincidentally happened 10 minutes after you added some lights. This is my best guess, since the power company was able to rectify the situation over the phone.

~ You need to figure out the Amperage for the circuit that your lights are connected to, and figure out how many appliances/lights/etc. are connected to that circuit already. Like I said, I think the outage was unrelated to your lights...however, if you plan on adding lights and other appliances to the circuit, you need to know this (to avoid blowing fuses or risk of fire).