Omega 315W 240V CDM Digital Ballast - Dimmable Ceramic Metal Halide Ballast
Best for: growers building or upgrading a 315W CDM/CMH lighting rig who want a dimmable, lightweight digital ballast.
Our thoughts
This is the control unit of Omega's 315W CDM lighting system, and it's a solid, no-frills digital ballast that does what it needs to - runs the lamp reliably with the flexibility to dim down or push past rated output if you need to. Pairs directly with the Omega 315W reflector and 3000K lamp if you're building the full kit.
The Omega 315W 240V CDM Digital Ballast is a dimmable electronic ballast built to run 315W CDM (ceramic discharge metal halide) and CMH lamps in both 3000K and 4000K colour temperatures. It comes in a lightweight aluminium casing with a 1-metre flying IEC power cable, is CE certified, and offers four output settings - 150W, 250W, 315W and a 340W "super lumens" setting that boosts light output without drawing significantly more power.
CDM/CMH technology produces a light spectrum closer to natural daylight than older HID ballasts, and being digital rather than magnetic, this ballast runs cooler and lighter than the older-style units it replaces.
How it compares
315W CDM ballasts are a fairly standardised category, but there's still real difference in features between brands.
- Offers more dimming flexibility (four settings including a 340W boost mode) than many single-output CDM ballasts on the market
- Sits in a similar space to Lumatek's 315W CMH ballast, though Lumatek kits are typically sold with a hammertone reflector as standard and priced accordingly higher
- A more affordable route into CDM lighting than Gavita's Pro 315e fixture, which bundles ballast and reflector into one higher-spec, higher-priced unit
Good value if you want CDM's spectrum benefits without paying Gavita or Lumatek prices for the ballast alone.
Usage guidance
Lamp compatibility
Use with any 315W CDM lamp, or CMH lamps rated 3000K or 4000K - it isn't compatible with standard HPS or MH lamps of other wattages.
Dimming settings
Start at the standard 315W setting for most grows; use the 150W or 250W settings for smaller spaces or to reduce heat output, and the 340W super lumens setting only if your reflector and space can handle the extra light and heat.
Mounting
The ballast is wall-mountable and comes with a 1-metre IEC cable - plan cable routing to your reflector before fixing it in place.
Technical specifications
- Brand: Omega
- Ballast type: digital, dimmable
- Rated power: 315W
- Dimming settings: 150W, 250W, 315W, 340W (super lumens)
- Compatible lamps: 315W CDM, CMH 3000K and 4000K
- Casing: lightweight aluminium
- Power cable: 1-metre flying IEC cable
- Certification: CE certified
- Warranty: 2-year manufacturer's guarantee
- Voltage: 240V
Who this is for
- Growers building an Omega 315W CDM lighting kit from separate components
- Anyone upgrading from an older magnetic HID ballast to a lighter digital unit
- Growers wanting dimming flexibility across a single fixture
- Budget-conscious buyers wanting CDM spectrum benefits without Gavita or Lumatek pricing
Our take
As the core of a 315W CDM setup, this ballast does exactly what it's there for - reliable dimmable power delivery with a couple of years' warranty behind it. Pair it with the matching Omega 315W reflector and 3000K lamp for a complete, compatible kit rather than mixing brands.
Does exactly what it should, day in, day out.
