Lumii Solar Pro 630W DE CDM Lamp - Full Spectrum 3200K Grow Bulb
Best for: growers running a double-ended CDM fixture who want a full-spectrum bulb closer to natural sunlight than standard HPS.
Our thoughts
CDM lighting has earned its reputation for a reason - the spectrum genuinely looks and behaves differently to old-school HPS, and growers who've made the switch tend to stick with it. This is the lamp only, so you'll need a compatible DE CDM fixture and ballast rather than dropping it into a standard HPS setup. Proper kit at a price that makes sense for premium double-ended lighting.
The Lumii Solar Pro is a 630W double-ended ceramic discharge metal-halide (CDM) lamp with a 3200K colour temperature, built to deliver a spectrum that's much closer to natural daylight than a typical high-pressure sodium or standard metal-halide lamp. It produces roughly 37,800 lumens and is rated for around 20,000 hours of use, with a lower power draw and lower heat output relative to its light output than equivalent HID options.
The 3200K colour temperature is weighted towards flowering, but because it's a genuinely full-spectrum lamp it holds up through the vegetative stage too, rather than needing a separate bulb swap between grow phases the way some HPS/MH combinations do. This is a double-ended lamp, which means it needs a DE CDM-specific fixture and ballast - it won't fit a standard single-ended HPS reflector.
How it compares
CDM/CMH lighting sits above standard HPS and below full LED fixtures in the current lighting market, prized specifically for spectrum quality.
- Delivers a spectrum closer to natural sunlight than standard HPS, which is why CDM has become popular for finishing flower quality rather than raw yield alone
- Lower heat output than an equivalent-wattage HPS lamp, which matters if your tent is already running warm from other kit
- Genuinely full-spectrum, unlike single-spectrum HPS bulbs that need swapping between veg and flower stages
You're paying a premium over basic HPS for spectrum quality and lamp life - a sensible upgrade if you've already got, or are ready to invest in, a DE CDM fixture.
Usage guidance
Fixture compatibility
Check your reflector and ballast are rated for double-ended CDM lamps at 630W before fitting - this won't work in a standard single-ended HPS setup.
Positioning
Hang at manufacturer-recommended distance for your canopy size and adjust as plants grow, since CDM lamps run differently to HPS in terms of heat spread.
Growth stage
Use through vegetative and flowering alike thanks to the full spectrum, rather than treating it as a flowering-only bulb.
Lamp life
Track running hours and plan a replacement as you approach the 20,000 hour mark, since light output and spectrum quality both drop off gradually with lamp age.
Technical specifications
- Brand: Lumii
- Range: Solar Pro
- Lamp type: double-ended ceramic discharge metal-halide (CDM)
- Wattage: 630W
- Colour temperature: 3200K, full spectrum
- Luminous flux: approximately 37,800 lumens
- Rated lifespan: approximately 20,000 hours
- Fixture requirement: DE CDM-specific fixture and ballast
Who this is for
- Growers already running a DE CDM fixture who need a compatible replacement bulb
- Anyone upgrading from HPS for better spectrum quality and finish
- Growers who want one lamp that covers vegetative and flowering without swapping bulbs
- Growers prioritising light quality over the raw efficiency of LED
Our take
This is a proper premium lamp for growers who've already bought into double-ended CDM lighting, or are ready to. The spectrum and lamp life justify the step up from standard HPS, provided you've got the right fixture to run it in.
Worth picking up if you want reliable performance you can build a grow around.
