For several years, I've been recommending a specific bulb to light the refugium area. The reason I like it is simple: it's inexpensive, easy to clean, and doesn't use much power. Not to mention the 5100 Kelvin spectrum works great for macro growth. Here's the original article
with the link to ordering them online
(they are NOT available at Home Depot). I recently placed a new order with the company, and the salesman told me they were very
popular in the aquarium hobby - imagine that. I guess Melev's Reef did a good job getting the word out.