This is essentially copied text from another post I made:
I don't know why I never hear of these here on SB, but I am totally blown away by my new 24 watt HID for 380 bucks on Scubatoys.com.
Yes, you heard me right - 24 Watt HID for less than 400 bucks. Lithium ion battery, 120 Min burn time per charge, absolutely the brightest thing underwater. Comes with an amber filter for color correction for video and stills - tested it and really creates true color. Also comes with video diffuser filter.
Sure it doesn't have a cable cannister set up, so you have to hold it lantern-style, but to save a grand as compared to the Dive-Rite 21W for a brighter light? No-brainer. Bulb is more durable than Dive Rite too.
I set mine up with black light filters to take advantage of the high UV output for BioFluorescent night dives - real cool to see corals fluoresce.