It's actually a higher quality bulb than a lot of bulbs you find at a hydro store. The spectrum is just different. It's their better option because it's one of the most expensive. It DOES put off about 8 thousand more lumens per bulb than the sylvania bulb, but it's also 90 dollars. The sylvania is 19.98 and it's not considered a grow light however it will work in your ballast (s51). I've had great results with it. The only huge difference is the price.dont get the shit bulb. good lights what its all about. those hortiluxes are the best bulb my two grow stores have as their better option
Exactly. I can't either.My 400 watt HPS Sylvanias have served me well for years. I just can't find $70.00 worth of good argument to change.