Anyone use sodium lights

[bct15]

I was talking on the phone with an online coral retailer a while back who told me they use sodium (hps) lighting over their tanks. One of my favorite sps frags came from these people so I have to believe they know what they are doing. Does anybody else use these?

 

[myzislow]

High pressure sodium blubs are extremely yellow. They would def. grow coral, probably very well in fact. The spectrum would def not be for everybody, though.