Right now I have a twin strip light set up with two 17watt 8000k bulbs. From what I've read these are color-enhancing lights. Even though 90% of my plants are low light I do have water sprite and would like to add more plants to my 20long tank. Would like to know if Life-glo 6700k 20watt would be worth getting for one light. Or should I get maybe a plant light like Flora-glo? Or good what I have?