The pro-emit DIY-M-KIT 2 short Series 300W is a modular, passively cooled DIY LED grow light aimed at rectangular grow spaces. It uses four 75 W LPG 3‑channel boards (360×40 mm each) for a total input power of 300 W and recommended coverage up to 150×50 cm. Each board combines 81 Samsung LM301B (5000 K) on Channel 1, 45 Samsung LM301B (3000 K) plus 4 Cree XP‑G3 PhotoRed on Channel 2, and 2 Cree XP‑E2 FarRed on Channel 3. All three channels dim 0–100% via onboard potentiometers and 0–10 V capable Mean Well drivers, with optional app control via suncontrol. System efficacy is listed at 2.8 µmol/J with 840 µmol/s PPF. Dimensions are 113×42×8.3 cm, weight 10.9 kg, and rated lifetime 50,000 hours.