You bet those will work, and look a lot better, as well as save some on the electric bill, last longer, and not get so hot on your tank.
Also, I agree on the subject of not feeding your fish solely flake food. Most fish can live on this "staple" just like you could live on rice, considered a human "staple"... but it's not necessarily the healthiest thing to feed them every single day.
Most fish are omnivores, and will eat just about anything you offer them. I try to alternate dried bloodworms, live ants (since I have a small ant problem around here, it's a win-win situation

...), and algae tablets, as well as sinking shrimp pellets, not just flakes... the variety will make for more active and colorful fish that are healthier on the whole. (This isn't even counting the snails they pick off of the plants, or the roots of the plants that they dig up and eat...) Not everyone goes to the extreme I do in providing a variety of foods to their pets, but it's kinda fun for me to decide "what's for dinner" every other night (and yes, I skip every other day...)...