that is a cfl, u can see the shape of it in the picture, i got the same ones as this lad, im using 2 125w cfl's for 4 plants, same shape as this kids. if u have ten 25w bulbs for one plant u stil only have the same amount of lumens and usable light that just one 25w bulb, except the light is spread around the plant and seeing as a plant is evolved to make the most out of light, one 125w putting out bare lumens is cushty for ur plant, get so many idiots on this site just copying what other people say and saying that u need tons of cfls touching every leaf of the plant, erm.... no mate...... in the wild there is only one fucking light source that puts out similar lumens to a 125w, yet there isnt just one leaf is there, propper pisses me off.