Can Coralife 50/50 compact fluorescent bulbs to used effectively to grow
plants?

Yes. 50% actinic bulbs may not be ideal, but they work well enough.

If you really want this fixture, get it. When it comes time to replace the
bulbs, replace them with the kind you prefer.

OTOH, you can probably find fixtures that come with non-actinic bulbs. AH
Supply, Custom Sealife, etc.

Leigh

http://www.fortunecity.com/lavender/halloween/881/