Theories abound on how to save money on your energy bills, but nothing is more brilliant -- literally -- than the tip we picked up when design expert Carter Oosterhouse dropped by the "Rachel Ray Show" to offer some sage home improvement advice.
It turns out, many of us have been using CFL bulbs all wrong. And, getting it right could save as much as $150 for every 20 bulbs.
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Check out the video above to find out why timing when you turn your lights on and off is the key, and brush up on the difference between CFLs, halogens and LEDs in our light bulb buying guide.