I have a 40breeder tank with 18K and antenic T5 bulbs. I am thinging of adding an articulating arm 150 watt MH to the tank to increase the lighting. I would like your oppenions on if this is to much for a tank that is about ten inches from the water to the substrate. If not what temp light do you think would look nice. I was thinking a 10K bulb. If the watt is to high I can get the same unit in a 70 watt version. Thanks