Hi and good evening all

I was wondering if anyone had any lighting suggestions for a 20 g tank I have a coral life power compact 130w on there now but I don't think it is enough light.

I would love to get a small maxima clam and stock my tank with some more corals and an anemone so any suggestions on what lighting to use would be greatly appreciated.

I was thinking a 150w mh 18k-20k light would this be enough light to keep any corals and clams?

if not your suggestions ideas would be appreciated thanks.