LEDs are so much more efficient than fluorescents that in many small offices with two four-bulb fluorescent fixtures we can convert to a single LED flat-panel and provide the same lighting, which doubles the savings when converting.
Interestingly, a ballast protects the fluorescent bulb by regulating the power to the bulb. The ballast uses electricity, but does nothing to increase the lumen output. Therefore, the ballast further diminishes the efficiency of the fluorescent bulb fixtures. LEDs do not require ballasts.
By the way, small offices generally have two fixtures instead of a single larger one because fluorescent bulbs do not spread light efficiently. A single fixture in the middle of the room would leave shadows in all corners. This is not an issue with LEDs. The light is spread more evenly, producing a better light pattern that actually makes the room appear larger.
All of our product listings include a lumens per watt rating. When comparing the ratings of fluorescents remember to include the ballast, and understand that when a fluorescent bulb is flickering or you see waves in the bulb light, it is not working at peak performance. LEDs do not do this. Our LEDs are guaranteed to provide a sufficient amount of light for the life of the bulb.
You may ask yourself how a 54 watt LED can replace fluorescent bulbs using 128 watts. The answer lies in the efficiency of energy usage.
Anyone who has touched a fluorescent bulb that has been lighted for a few hours knows that you will get burned. It gets very hot.
Heat, like light, is a form of energy. Therefore, heat is additive with light in the use of wattage.
LEDs produce very little heat, so most energy (wattage) is directed to light.
The result is a very high lumen/watt ration. Of course, the next logical question is, "What is a lumen?"
Lumens are a measure of light intensity, so lumens per watt measures either how much light is produced by a watt of energy, or how many watts it takes to produce a certain amount of light.
A typical fluorescent bulb produces 15 lumens per watt, so a standard 4-foot florescent bulb that uses 32 watts produces 480 lumens of light. A four-bulb fixture would then provide 1,920 total lumens.
LEDs are considerably more efficient. Our LEDs provide 96-100 lumens per watt. A standard 54 watt flat-panel fixture emits 5,184 lumens of light, or 260% of the light from a 138 watt fluorescent fixture (128W from the bulbs, 10W from the ballast).