some kind of blue Here's 5 reasons to switch your pool lighting to L.E.D. Cheaper L.E.D. lighting can cost up to 5 times less than incandescent traditional pool lights. 2. Eco Friendly An average l.e.d. bulb uses up to 75% less power than a traditional bulb. They use less energy so they are not only less expensive to run but kinder to the environment. 3. Longer Lasting Bulbs A traditional bulb in a pool lighting kit lasts an average of 5000 hours.