ThinkGrow’s Model-I Plus is a 720-watt, single-bar LED toplight built for greenhouse and single-level indoor cultivation. It delivers 1,944 µmol/s PPF at about 2.7 µmol/J and uses Samsung LM301B diodes. The Plus version adds four independently controllable spectrum channels (UV, White, Deep Red, Far Red) when paired with TrolMaster Hydro-X Pro (HCS-2/HCS-3) controllers, enabling tailored light recipes. The compact V-shaped panel improves distribution so the fixture can hang closer to the canopy. Coverage targets roughly 4×4 ft in flower and 5×5 ft in veg. The fixture draws 100–277 V autosensing, carries an IP66 rating, and is rated L90 > 54,000 hours. Physical dimensions are 45.24 × 4.36 × 6.46 inches and weight is about 22.33 lb (10.13 kg).