this bar is supposed to be equal to a 250 watt but uses 12watts i got 2 and 2 red 25 bulb panels for side lighting that use like 15 watts or somthiing, with my 430 watt hortilux so my flower room uses around 460 watts but i get around an 800 watt light output. i think if you have the extra cash you should buy a few just so you can see..