A prime would be overkill for a BC8.
It is by far a superior light compared to a par 38 BUT...they are 229plus tax at most retailers.
You can get a great quality par 38 for 60 bucks on Ebay.
Or you can go with a controllable par 38 like this one for around 100
http://www.ocreef.com/par38_led_aquarium_lights
If you're gonna upgrade tanks down the line, or you just love to spend as much money as possible, an AI prime makes sense. Otherwise, you should seriously consider the other options...
Its all very personal, but if it were me, I would just go with a good quality full spectrum par 38 with on/off capability.