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The German-made Radium 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.
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Average Customer Rating
 5.0
out of 5 100% recommend it to
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Best bulb on the market
by
Ash
from
Florida
on
12/9/2009
Recommends it to Friends:
Yes
Have three of these running over my 125 mixed reef. GREAT bulb. Brings out all the crisp whites and the really nice blues. No need for actinic sup. I have a very compact, closed canopy, and am using these with three Lumenmax elites, so I have no room in the canopy for anything else. Will never use another bulb...I AM considering upgrading two of my 250 galaxy ballasts to two 400watts, but we will see about that soon enough.
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