ReefLux™ is the first true 10000K full spectrum metal halide bulb to be offered to the aquarium market. Other manufacturers claim to offer a 10000K lamp but that is just a marketing number of their best attempt to offer a full spectrum 10000K lamp. This is why they have a yellow or orange appearance and need to have some kind of fluorescent actinics to balance it out. Generally the more yellow or orange a bulb the more PAR the bulb will produce. ReefLux™ offers you the highest PAR rating without having to flood your aquarium with high powered fluorescent blue bulbs. The ReefLux™ 12000K has the performance of the 10000K but with a touch of blue added. ReefLux™ bulbs will work with electronic ballasts, M59 pulse start ballasts, and M80 pulse start ballasts.

They do not perform properly with the probe start M58 or lower ballasts