Omega 315w CDM Grow Light - Full-Spectrum Ceramic Discharge Fixture for Bloom
Best for: growers who want a full-spectrum, sunlight-like light source for the flowering stage, either as a standalone fixture or as a supplement to HPS or LED lighting.
Our thoughts
CDM/CMH lighting earns its keep on spectrum quality rather than raw output, and this fixture is a straightforward way to get that spectrum into a flowering room. It's a fixture (ballast and reflector), so you'll want a 315W CDM lamp to go with it - once that's sorted, it's a genuinely useful bit of kit for tightening up bud structure in bloom.
The Omega 315w CDM Grow Light is a complete ceramic discharge metal halide (CDM/CMH) fixture, combining a ballast, an Omega Eurowing reflector, and a PGZ/E40 ceramic lamp holder in one open-style unit designed for good heat management and even light spread. It runs at 315W and is built to pair with a 3000K CDM lamp, giving a broad, sunlight-like spectrum with strong PAR output and added UV - a spectrum that's noticeably closer to natural daylight than a standard high-pressure sodium (HPS) lamp.
The fixture includes integrated short-circuit protection for safety, and at roughly 1.9 µmol/W efficiency it gets strong usable light levels from a relatively low wattage. It can be run as a standalone light for smaller grow areas, or used as a supplemental light alongside HPS or LED fixtures to boost spectrum quality during bloom.
How it compares
CDM/CMH fixtures occupy a middle ground between HPS and LED, valued mainly for spectrum quality rather than headline efficiency figures.
- Compared to a 600W Omega Dual Spectrum HPS lamp, this 315W CDM fixture uses roughly half the power for a noticeably different, more daylight-like spectrum
- Against premium CDM fixtures from Gavita or Lumatek, this is priced well below what those brands typically charge for a comparable 315W unit
- Compared to an LED fixture of similar wattage, CDM produces more radiant heat but many growers still prefer the CMH spectrum for finishing flower
If you want genuine CMH spectrum quality without paying premium-brand prices, this fixture delivers it at a sensible cost.
Usage guidance
Lamp required
This fixture is supplied without a CDM lamp - pair it with a 315W CDM lamp (3000K recommended for bloom) to get it running.
Standalone or supplemental use
Run it as the sole light source in a smaller grow area, or alongside an existing HPS or LED fixture to add spectrum breadth during flower without significantly increasing heat load.
Mounting
Hang using the fixture's built-in points, keeping the open-style reflector clear of obstructions so heat can dissipate properly.
Technical specifications
- Rated power: 315W
- Lamp type: Ceramic discharge metal halide (CDM/CMH), 3000K recommended
- Reflector: Omega Eurowing, open-style
- Lamp holder: PGZ/E40 ceramic
- Efficiency: Approx. 1.9 µmol/W
- Safety: Integrated short-circuit protection
- Use case: Standalone or supplemental bloom lighting
Who this is for
- Growers wanting a dedicated CMH spectrum boost for the flowering stage
- Small-space growers who want a complete lower-wattage fixture rather than a full 600W or 1000W HID setup
- Growers supplementing an existing HPS or LED light with better spectrum breadth
Best suited to bloom-stage use, either as a main light in a smaller space or a spectrum-boosting supplement elsewhere.
Our take
This is a properly built CDM fixture with a genuine daylight-style spectrum, not a re-labelled HPS setup, and the integrated short-circuit protection is a sensible safety touch. Remember you'll need to add a 315W CDM lamp separately to get it working.
Does exactly what it should, day in, day out - a solid way into CMH lighting without premium-brand pricing.
