DIY-M-KIT 2 long Series 300W from pro-emit is a modular, three-channel LED grow light built around four LPG 3‑Channel DIY boards on 76 cm heatsinks. Each board combines 81 Samsung LM301B (5000K), 45 Samsung LM301B (3000K), 4 Cree XP‑G3 PhotoRed and 2 Cree XP‑E2 Far Red diodes, for 528 LEDs total. The 300 W variant is rated at 840 µmol/s PPF with a system efficacy of 2.8 µmol/J and passively cooled, dimmable 0–100% per channel. Recommended coverage is up to 100 × 100 cm. Typical dimensions and weight for this version are 80 × 45 × 8 cm and 10.29 kg. Power is supplied by Mean Well ELG‑150‑C1400B and LCM‑25 drivers; lifetime is specified at 50,000 hours.