GrowLite 315W Full Spectrum CMH Lamp with Mogul Base at 4000K
The GrowLite 315W CMH runs a 4000K full spectrum that replicates 95% of the solar spectrum — closer to natural sunlight than any standard HPS or MH lamp gets. It pushes 32,000 initial lumens at 102 lm/W with a CRI of 98, meaning the light quality across visible wavelengths is nearly indistinguishable from daylight. That matters because plants evolved under full-spectrum sunlight, and the closer you get to replicating that distribution, the more balanced the morphological and metabolic responses you'll see across both veg and flower stages.
20,000-Hour Mogul Base CMH Lamp for Full-Cycle Indoor Grows
Rated at 20,000 hours, this lamp outlasts most MH and HPS alternatives by a wide margin, and the single-ended mogul base (E39) threads into standard SE CMH fixtures without adapters. It's an open-rated lamp, meaning it can run in open reflectors — but the UV warning applies: short-wave UV output can cause skin and eye irritation if the outer envelope is damaged, so inspect before each use and always wear CMH-rated protective eyewear like the Summer Blues Optics MH/CMH REVERT glasses. The 4000K positioning makes this a true full-cycle lamp that handles veg and bloom without the spectral compromises of pure MH or HPS.
Key Features
- 95% Solar Spectrum Replication: Delivers near-sunlight spectral distribution for balanced plant morphology and metabolic response across all growth stages
- 32,000 Initial Lumens at 102 lm/W: Strong lumen output with high efficacy from a 315W draw, keeping energy costs low while covering meaningful canopy area
- CRI 98: Near-perfect color rendering means the spectral distribution is genuinely full-spectrum, not just marketed as such
- 20,000-Hour Rated Life: Outlasts most MH and HPS lamps by thousands of hours, stretching replacement intervals and reducing per-cycle lamp costs
- Mogul Base (E39) Open-Rated: Threads into standard single-ended CMH fixtures and runs in open reflectors without requiring enclosed housing
Technical Specifications
| Specification | Value |
|---|---|
| Lamp Type | Ceramic Metal Halide (CMH) |
| Wattage | 315W |
| Configuration | Single-Ended (SE) |
| Base Type | Mogul (E39) |
| Color Temperature | 4000K |
| Spectrum | Full Spectrum (95% Solar Replication) |
| Lumens (Initial) | 32,000 |
| Efficacy | 102 lm/W |
| CRI | 98 |
| Rated Life | 20,000 Hours |
| Growth Phase | Full-Cycle (Veg + Bloom) |
| Fixture Rating | Open-Rated |