The 20000K metal halide bulb offers excellent coloration and good intensity. It is crisp-white with a strong blue tint. It brings out the fluorescent pigments in corals nicely. Fluorescent supplementation is usually not necessary, but can be used for added intensity and to simulate dawn and dusk. An excellent choice for reef tanks 18" or deeper. on how the different Kelvin ratings appear and more information on metal halide bulbs.
I purchased 2 of these lights to go on a 40 long tank and I like the look of the lights sitting above overhead the tank.
Of course they have 2 settings one which is a soft blue for evening.
The quality and price have pleased me too.
Guppies loved it and I think my puffer will need a few more tries to take to the frozen daphnia, but she’s a diva about all foods until she’s tried them a few times.
