First I would slow down. There sound be no rush to go out and get an anemone. Second, however told you that sebaes are easy anemones to keep are mistaken. Do a little more research and talkto folks over in the reef forum. They will correct that situation. Actually, carpets, bubble tips, then long-tentacles are the easiest in that order according to my research. Bubble tips are probably preferred for a lot of reasons as starter anemones, which souldn't be started until a tank is mature and capable of meeting its requirements. Don't shy away from an anemone, but don't get one until your tank is well established. Now, the lighting subjuect can give you a variety of opinion. First, if you have a canopy or can build a canopy, I'd do that. Then you can buy retrofit kits (vho, pc, mh, or combinations of all etc.) that are assembled and ready to just screw into your existing canopy. This a usually cheaper route for seriously upgrading your lights. For a 90 gallon, you'll need a lot of light. Think about what you will want to keep before you settle on just the cheapest thing. For 90 gallons, I doubt that 150 to 200 watts of pc will be near enough. If you want a variety of coral types (lps, softies, sps), I'd consider a vho-pc combo maybe. If you are only concerned with sps corals, I'd probably get mh. You see my point? There is a lot to consider. Good luck.