Pro-emit’s Jacks 1m² Killer LED Grow Light #3C is a foldable six‑bar fixture designed for 1.0–1.2 m² flowering areas. The lamp draws 513.6 W and outputs about 1540 µmol/s at roughly 3.0 µmol/J. Three independently dimmable channels combine Samsung LM301B white diodes (3000K and 5000K) with Osram deep red 660 nm and far‑red 730 nm, yielding an overall ~3500 K spectrum when all channels run. The external driver box uses two MeanWell ELG‑240 drivers (plus an auxiliary) with manual dimmers and RJ11 control compatibility. Passive cooling keeps operation silent. The fixture measures 95 × 95 × 6 cm and weighs about 15.4 kg. Recommended coverage is 100×100 to 120×120 cm in bloom (up to 150×150 cm in veg). Rated lifetime is 50,000 hours.