Growers Choice 315W CMH Lamp 4200K | 535 µmol/s SE Veg

Growers Choice 315W CMH 4200K: Full-Spectrum Vegetative Lamp

The Growers Choice 315W SE CMH 4200K pushes 535 µmol/s initial PAR with a CRI of 97 — near-perfect color rendering that means the spectral distribution is genuinely full-spectrum, not just marketed as such. At 4200K, the cooler color temperature favors the blue-dominant output that drives vegetative structure: tight node spacing, thick stems, and strong lateral branching. The precision gas fill is the same technology used in the 3100K bloom variant, tuned for a different spectral profile.

Near-Sunlight CMH Spectrum for Veg Rooms and Transitional Growth

That CRI 97 rating puts this lamp closer to natural sunlight than any standard MH or HPS gets, which means plants receive a spectral distribution they've evolved to respond to — not just the narrow bands that artificial lamps typically emphasize. Generates significantly less heat than HPS and MH at the same wattage, giving growers more flexibility in rooms with limited cooling capacity. Rated at 10,000 hours with consistent spectral output throughout the lamp's life. Also available in 3100K bloom and 630W DE configurations. The single-ended format fits standard SE CMH fixtures and ballasts.

Key Features

• 4200K Vegetative Spectrum: Cool CMH output promotes tight node spacing, thick stems, and strong branching structure during the vegetative growth phase
• CRI 97: Near-perfect color rendering delivers a spectral distribution closer to natural sunlight than any standard MH or HPS alternative
• 535 µmol/s Initial PAR: Strong photon output from a 315W draw with substantially less heat generation than HPS at equivalent light levels
• Precision Gas Fill: Same engineered gas chemistry platform as the 3100K variant, tuned for a cooler vegetative spectral profile
• 10,000-Hour Rated Life: Maintains spectral quality and PAR consistency across the lamp's full service life before replacement

Technical Specifications