lighting is not the only thing needed to be able to keep a anenome.. you need good water and the know how... if you have that down then you should already know what you need.... but since you asked
... you can get away with t5 with good indevidual reflectors if the tank is no taller the 20'' imo ( unless you use a crap load of t5.. like 8...) you can even get away with pc for a bta if it's a super low tank.. like 10'' high... ( even though it would be a beefy amount of pc lighting)
YzGyz