Very Odd phenomenon

I got up early this morning, oh about 4:30 am. I looked out the window to see how many of my solar lights lining the walkway were on. Only one was on. Then about 6:30 am we got a thunder storm complete with lightening. I glanced out the window and saw two more of the lights on and went to look at the others and WOW...all 8 were lit up. The storm lasted about 10 minutes and went I went to check on them, only 3 were on. It is still fairly dark at 7 am and the lights are usually not on in the morning. Makes me think more about the energy in lightening.