I've come into a used 150 gallon tank at a great price and would really like to move my 50 gallon reef tank into it. It main problem I'm running into is with the lights. It had been used as a freshwater tank before and so only comes with a dual strip light. I know with the depth of the tank I want to go with metal halide lights. I've been thinking of 3 250 watt 20k pendant lights but can't swing the $1000 or more for new mh lights. Any ideas for a cheaper source or possibly used ones? Thanks!!!