This offer has been around for awhile but I thought it was worth mentioning for anyone who has yet to take advantage of it.
Get CFL Light Bulbs from Duke Energy for Free! Ohio Duke customers may each be eligible for a different number of light bulbs. It depends on how many bulbs or coupons for free bulbs you have received in the past.
Find out online if you qualify and how many CFL's you can request here. Or call 1-800-943-7585. Press option #1 and then #1 again. You will have to enter either your Duke Energy Account number or phone number plus the last 4 digits of the primary account holders social security number.