So, my current 30 watt lesser known brand light doesn't seem to be sufficient to meet the requirements of many SPS corals in the opinion of members of this site I talked to and since I'm definitely no genius when it comes to lighting, I decided to get a Zetlight model ZE8600M (55W) and before I buy it was hoping to have you guys weigh in. The tank is only 20 gallons. Does this light seem sufficient? I can show a picture of the light from the internet to show what I'm talking about.