I got given a light and a ballistrate today, but we don't know if it's any good for growing. On the side of the bulb it reads; E 39/40, 4KV, pulse rated. This means nothing to me, can anyone explain? It seems to be pretty bright and it feels warm on my hand. The bulb is a round shape with a aluminium shade covering it. Looks cool!!!! Could it grow anything that is the question?!