Manufacturers claims of kelvin color temps of bulbs are worthless. If you like the look and the bulb has enough par to grow corals, that's all that matters.
We use that bulb in a 150watt single ended config over our 42hex tank. (it is the only light we have over the tank) While I am sure not actually 50k, it does look awesome as the only bulb over the tank. (Both for the coral growth as well as viewing)
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