Flouresants need to be almost touching the plant to be effective at all. They ARE good for rooting clones , though. Put the back of your hand up to the light, then move it away slowly, can you see how fast the light gets weaker? They don't project the light very well so a 2ft plant gets little light below the growing tip. A 250-400 watt halide would be great if you're growing from seed. 250 is good on short clones. 10 short clones produce more than 1 tall "from seed" plant if sq footage is why you want only 1. Just my opinion...