Philips Greenpower 400V 1000W Lamp - Double-Ended HPS for Commercial Flowering
Best for: Growers with a 400V double-ended HPS ballast and fixture who want maximum PAR output for large-canopy or commercial flowering rooms.
Our thoughts
This is a lamp, not a full fixture, and it's a serious one - 400V double-ended HPS is the format commercial growers reach for when they want maximum light output per fitting. If you've already got the 400V DE ballast and reflector to run it, this is about as much verified PAR as you'll get from a single HPS lamp.
The Philips Greenpower 400V 1000W is a double-ended (DE) high-pressure sodium lamp, meaning it has contacts at both ends rather than a single screw base, and it needs a dedicated 400V DE ballast and fixture to run - it will not work with a standard single-ended E40 setup. Double-ended HPS lamps like this are the standard choice in commercial cannabis and vegetable propagation facilities because they deliver significantly more light output per fixture than single-ended equivalents.
Philips rates this lamp at a PPF of around 2100 µmol/s with a luminous efficacy of roughly 155 lm/W, among the highest efficiency figures available in HPS lighting, and a colour temperature of around 2000K, putting it firmly in warm, red-heavy flowering spectrum territory. It runs on a K12x30s base rather than the E40 fitting used by single-ended lamps, and Philips states a nitrogen-filled, quartz outer jacket construction for optical clarity and consistent output over its life.
How it compares
1000W double-ended HPS lamps are a small, high-output category dominated by a handful of established manufacturers.
- Osram and Sylvania both produce comparable 1000W 400V DE HPS lamps in the same output bracket, so this is very much an apples-to-apples competitive category rather than a unique product.
- Compared with a 1000W-class LED fixture, this lamp costs considerably less upfront but requires a separate ballast and fixture, and runs noticeably hotter, which affects room cooling requirements.
- Within HPS specifically, 400V DE lamps like this consistently outperform 240V single-ended 1000W lamps on efficacy, which is why commercial growers standardised on the DE format.
If you're set up for 400V DE and chasing maximum HPS output, this lamp is squarely in line with what the established commercial brands offer at a comparable price.
Usage guidance
This lamp only works with a compatible 400V double-ended ballast and fixture - check your existing setup before ordering.
Fitting
Install using the K12x30s double-ended base into a DE-specific fixture; do not attempt to run it on single-ended E40 equipment.
Hanging height
Because of the high output and heat, hang well above the canopy (typically higher than an equivalent single-ended lamp) and monitor leaf surface temperature to avoid heat stress or bleaching.
Cooling
Factor the extra heat load into your room's extraction and cooling plan - DE HPS lamps of this output put out more heat than single-ended equivalents and often need air-cooled reflectors or hoods.
Technical specifications
- Lamp type: Double-ended (DE) high-pressure sodium
- Wattage: 1000W
- Voltage: 400V
- PPF: Approx. 2100 µmol/s
- Efficacy: Approx. 155 lm/W
- Colour temperature: Approx. 2000K
- Base: K12x30s (double-ended)
- Construction: Nitrogen-filled, quartz glass outer jacket
- Requires: Compatible 400V DE ballast and fixture (sold separately)
- Brand: Philips
Who this is for
- Commercial growers and large-canopy setups already running 400V DE ballasts and fixtures
- Growers chasing maximum verified PAR output per fixture rather than spreading output across more, smaller lamps
- Anyone upgrading from single-ended HPS who has already invested in DE infrastructure
- Growers prioritising HPS output and cost-per-µmol over LED's lower running heat
Not suitable for single-ended E40 ballasts or fixtures - check compatibility before buying.
Our take
This is a genuine commercial-grade lamp doing a commercial-grade job - if you've got the 400V DE infrastructure to run it, the PPF and efficacy figures stack up well against the other established brands in this bracket. It's not a beginner product, but for the right setup it's exactly what large flowering rooms are built around.
One we sell a lot of for growers scaling up into DE lighting. Worth picking up if your ballast and fixture are already sorted.
