Omega 315W Lamp Adapter (PX-E40) — Convert Your E40 Reflector to Ceramic Metal Halide
Best for: Growers wanting to upgrade to full-spectrum CDM lighting without replacing their existing reflector
Our thoughts
If you've already got a decent E40 reflector and you're keen to move away from HPS, this adapter is a genuinely smart move. You keep the kit you trust, drop in a CMH lamp, and suddenly you've got a superior spectrum and lower running costs. That's proper value engineering.
The Omega 315W Lamp Adapter is a socket converter that transforms your existing E40 reflector into a ceramic metal halide (CDM) system without any structural changes. Simply screw it into your E40 socket, fit your 315W CDM lamp, and you've converted to a full-spectrum light that outperforms traditional HPS for both energy efficiency and plant response. This is the smart way to upgrade if you've already invested in a reflector you like.
How it compares
The Omega adapter sits in the budget-to-mid tier of CMH conversion solutions.
- Costs a fraction of a complete CMH kit (lamp and ballast sold separately)
- Works with 95% of standard E40 reflectors — no expensive new hardware needed
- CDM spectrum delivers higher PAR per watt than HPS, with longer lamp life (20,000+ hours vs. 10,000 for HPS)
- Lower heat output means reduced cooling costs
In short: you're getting the tech upgrade without the tech price tag.
Usage guidance
Installation
Screw the adapter firmly into your existing E40 socket. Thread your 315W CDM lamp into the PGZ18 end of the adapter. Make sure it's seated properly — a loose connection risks arcing.
First-time startup (critical)
On first use, run the lamp continuously for a minimum of 15 minutes. This allows the metals inside the lamp to fuse correctly. Skip this and you risk voiding the lamp warranty. Not optional.
Veg and generative lighting
Pair this with a 4200K CDM lamp for vegetative growth (stronger blue spectrum, shorter internodes), or a 3100K lamp for full-cycle or generative rooms (fuller red spectrum). One adapter, flexible approach.
What you'll need separately
This adapter requires a compatible 315W CDM ballast — standard HPS or MH ballasts won't work. Check your current ballast wattage before ordering.
Technical specifications
- Socket conversion: E40 to PGZ18
- Lamp compatibility: 315W ceramic metal halide (CDM)
- Physical dimensions: 2″ × 2″ × 3.8″
- Efficiency: 1.9 μmol PPF per watt
- Reflector compatibility: 95% of standard E40 reflectors
- Installation: Simple screw-in, no wiring required
- Ballast requirement: 315W CDM ballast (sold separately)
Who this is for
- Growers with existing E40 reflectors looking to switch from HPS to ceramic metal halide
- Budget-conscious operators who want spectrum upgrade without full system replacement
- Anyone running multiple tents where reflector investment is already sunk
- Commercial growers optimising cost per unit of light output
- Growers who value lamp longevity and lower heat output over sticking with legacy HPS
Our take
This is a clever bit of kit if you're not ready to bin off your existing reflector. CDM lamps deliver a more balanced spectrum than HPS — closer to natural sunlight — which translates to better plant structure and response across growth stages. The fact you get 20,000+ hours out of a CDM lamp versus 10,000 from HPS means the lamp costs flatten out fast.
At this price, it's a straightforward upgrade path if you've already got the reflector and ballast. Worth picking up while stock lasts if you're serious about moving away from HPS.
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