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This is a highly versatile product range with a variety of sizes, lamping and other options. These include: 4' luminaire with a continuous louver. Lamp Options: 1 or 2, 4' 28W T5 or 54W T5 HO lamps. 4' or 5' luminaire with a louver running down the center, and a panel at each end that can accommodate a variety of options including a blank cover, air return panel, sprinkler, speaker, daylight/occupancy sensor, or an MR16 halogen downlight. Lamp Options: 1 or 2, 3' or 4' T5 or T5 HO lamps. 5' lumi