lighting help

[j_treat911]

how much light wattage am i going to need to properly light a 40 gallon reef? i want to have the flexibility to have different types of corals and anenomes. the problem is i want to get a retrofit kit for my existing hood but i have a truvu tank which means the hood is only 24 inches long. would a CF light kit work okay? also what do the types of lights mean i.e. 10000k, 20000k etc. and what is the best type? thanks

 

[j_treat911]

actually my tank is only 15" high ... the tank is 36x15x15
do they make 175 watt MH bulbs that are only 22" or so? b/c the opening on top of the tank is only like 24" long

 

[j_treat911]

could i get away with a 175watt to start the tank out with? at least to get it cycling with the LR and LS? what heat level should i get for the best performance in a reef? 10K, 20K? thanks