Don't be fooled!
This is exactly the same light on sale in HD
. Not sure of the price - this sounds about right.
HOWEVER it is NOT a 500W fluorescent light!!! It is a 65W light that gives the equivalent of 500W of incandescent light.
So it's roughly the same as 65W of fluorescent - any kind of fluorescent.
I've got one of these only my fuge and, so long as you drill some holes in it for ventilation, it works great for that. Don't drill the holes and it typically dies in a month or so....
This light ouptut v. incandescent equivalent light ouptut thing has come up in the forum many times - try doing a search...