I have a Marineland 24" plant LED light and it uses 24 watts so the 50 watts for the 48" light seems about right. I have never heard of Beamworks but the price sure is dirt cheap. The feedback for the seller seems solid enough. Buyer beware though. Make sure to report back if you end up getting it. I would be curious to know if this is a viable, cheaper alternative. You could barely build one for that price.