I hate to go against the grain but my advice is
1. I kept BTA under 130 watts PC. I wouldn't recomend it as a rule, but depending on the animal and its previous enviornment, it is possible. I would buy the anemone, and observe where it is comfortable. If it quickly moves to the top, then get more light. If it stays near the bottom, let good enough be! I did feed regularly and had clowns hosting though..
2. Buy the anemone when your tank is stable .... not when you have surpassed some artificial time like 6 months or 1 year. Tanks that I have set up with sand live rock and the normal goodies tend to mature in 4-5 months. But there are other situations where the "6 month" rule doesn't apply. For example, i would feel comfortable adding an anemone to a 1 week old tank that was bare bottom, high flow, overskimmed, had properly cooked rock/no live rock, and low bioload. Take a look at how tanks are set up in marine labs....
3. buy a clone from a local reefer
4. IMO, BTAs are very hardy. A healthy anemoen, given a stable tank, good light, covered powerheads, moderately clean water, and proper nutrition will be the toughesr organisms in your tank .... besides damsels, maybe
