AH supply no longer has 13w bright kits, so aside from cramming 36w over a 3g, this isn't the route to go. If you can source the parts for a 13w kit: ballast, GX23 sockets, 13w bulbs, go for it, otherwise you may have to go buy a commercial fixture, gut it and then retro the hood. You could pull out the light, screw in a socket for a regular screw in bulb and use a screw in compact fluorescent light, but other than ditching the hood, there aren't a whole lot of options.
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