It would be better to get already the right lights for the anemone, if you really want it.
The worse thing is to get the light going and then to change for a stronger one when the animal is doing bad, in the future!!!
T5s are good. On a 75gal. You can have a 6 bulb fixture with plenty PAR and uniform light...
ATI PM is the best IMO.
If you want to go with MH you could have 2X 250W bulbs with supplemental blue T5s or LEDs.
I like all T5s better.
Let's see what others will post.
Grandis.