Odyssea makes a cheap unit, 48" long, external ballast, 2x 54W T5HO, i'd reccomend changing them yearly, the color will last longer in these than PC's, but dont expect miracles. good lumen output also, which is really what your after. an average T5HO (4') puts out about 5000 lumens, where your average VHO puts out 5400, and the T5 uses half the power of VHO's.
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