CFL - Compact Fluorescent Light
these are the little "spiral-y" type bulbs. they have a built in ballast at the base of the bulb. let's say a 4' fluoro tube emits 3300 lumens. 2 26-watt CFLs could put out 3200-3500 lumens. reference picture below.
GoldenGraham84 Reviewed by GoldenGraham84 on . flourescent lighting can sum1 explain CFL? is that just a technical name for flourescents? are they more powerful? most importantly, are flourescents acceptable throughout all stages of a plants life? Rating: 5