How much lighting do I need for my 55-gallon saltwater tank?

Best bulb for a saltwater tank with anemone?

• Hello. I currently have a 29 gallon Saltwater setup. As a light, I have a Power Glo High Intensity Aquarium Lamp 18000K, 20W (T-8) I wanted to know if this is the best lighting for my green bubble tip anemone? The anemone is doing great. In fact it seems to be thriving. I know that they need plenty of light from the research I have looked into. The problem is that I'm not to educated regarding the specs of the bulbs. The bulb I currently have was reccomended from a pet store where I purchase some of my saltwater supplies as well as food for my community tank. I just have noticed that the anemone seems to have lost a bit of it's green color on it's tips. Other than that everything seems to be fine. I was concerned that this may be because of the lighting? I also have a pair of Ocellaris Clown fish that are hosting the anemone well :) Any recomendations for better lighting would be much appreciated. I love my inhabitants in my tank and want to make sure that the lighting is superb for them. Thank you.

• Answer:

  you will have to spend about 200$ on new high intensity lighting, the fixture you have is not acceptable at all regardless of the bulb you choose. you need more intensity , 3-5 watt per gallon . this is only possible with t5 lights or power compact lighting. and these don't go in your current light fixture. try a better fish store for advice, or look for books by Julina Sprung or one of the other experts. I'm assuming you went to a petco/petsmart or something like that. That's the only place where they would sell you a single bulb and claim you can keep anemones with it.