Free? Yes, please!
Duke Energy customers can get Free CFL Light Bulbs! This is only for eligible customers so you'll need to verify your eligibility. You can either check eligibility online or call the Duke Energy Savings Line at 1-800-943-7585 (Press Option #1 and #1 again).
I just checked and we were eligible to get 15! We could choose to take as few as we wanted now. I went ahead and requested all of them! It stated to allow for 4-6 weeks for delivery.
It sounds like if you have previously received Free CFL's through Duke Energy, you may not be eligible again. Doesn't hurt to try!