PC lighting to fit 23" area

[Chad]

Ok,

I have an Eclipse 2 hood for my 20g reef setup.. recently the dumb stock light blew on me but they are shipping a replacement . Unfortantly I am out of a light right now. I want to build something to fit into this Eclipse hood, the width is maybe 4" max with a length of 23" or so. Does anyone have a recommendation on what I can use? BTW, looking to max out the wattage if possible.. without going overboard

Thanks

Chad