Lumatek Zeus LED Grow Light + 2 x 50W Far Red LED Kit — Full-Spectrum with Supplemental Far-Red Extension
Best for: Growers who want to unlock the Emerson effect and push yields.
Our thoughts
Extend your spectrum and dial in growth morphology properly. Far-red isn't essential, but when paired with full-spectrum output, the research backs up real gains in stem development and canopy fill. Bundle takes the guesswork out of what you actually need.
The Lumatek Zeus LED Grow Light + 2 x 50W Far Red LED Kit bundles two supplemental far-red bars (730nm peak output) with everything needed to integrate them into your Zeus system. This extends your spectrum from 400–700nm to 400–750nm, harnessing the Emerson effect to promote stem elongation, leaf expansion, and more efficient photosynthesis during vegetative and early flowering stages. Real research shows supplemental far-red can increase crop yields and shorten production cycles — the key is using it strategically, not just running it all the time.
How it compares
Supplemental far-red bars sit in their own category — not a replacement for full-spectrum, but a complementary layer.
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vs. Spider Farmer GlowR40/GlowR80: Budget-friendly alternatives, but Lumatek's daisy-chain design and passive cooling give you more scalability and less heat stress
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vs. Running full-spectrum alone: Without far-red, you're missing 10–20% of the spectral enhancement that commercial growers now expect. Zeus full-spectrum is solid, but this kit pushes it into the next tier
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vs. Standalone far-red units: Integration with Zeus means plug-and-play — no separate power supplies, no compatibility headaches
Bottom line: you're getting proven supplemental lighting at a realistic price, pre-configured to work with your existing system.
Usage guidance
Coverage and placement
Two 50W units are the recommended minimum for even coverage. Mount them horizontally above or within the canopy, depending on your tent layout. The 140° light distribution spreads the far-red across the growing area without hot spots.
Growth stage application
Far-red works best during vegetative phase and early flowering to promote stem fill and leaf expansion. Many growers also run it at the tail end of the cycle to maximise photosynthetic efficiency. Don't run far-red continuously — photoperiod timing depends on your plant morphology preferences and whether you want denser or taller growth.
Mixing with full-spectrum
The 50W far-red output achieves roughly a 10–20% far-red ratio when mixed with your Zeus full-spectrum output. That's the sweet spot for most indoor setups. If you see signs of stress (excessive stretching or colour changes), increase distance to canopy or reduce far-red photoperiod.
Integration and control
Both bars daisy-chain to a single driver (up to 18 units possible if you scale up later). The driver includes full circuit protection and automatically adjusts power output to match connected units. Driver sits outside the tent, reducing heat buildup — one less thing taxing your exhaust.
Technical specifications
- Configuration: 2 x 50W far-red LED bars
- Spectral output: Peak at 730nm (far-red)
- PPF (Photosynthetic Photon Flux): 155 µmol/s per bar
- Efficacy: 3.1 µmol/J
- Input power: 50W (±5%) @ 230V AC
- Input voltage: 220–240V AC, 50–60Hz
- Light distribution: 140°
- Dimensions per bar: 1000 x 48 x 42mm
- Weight per bar: 1.2kg
- Waterproof rating: IP65
- L90 lifespan: 45,000 hours (90% output retention)
- Included: 2 x 50W bars, 4m power cable, 1.5m daisy-chain cable
- Daisy-chain capability: Up to 18 units per driver
- Compliance: CE certified, LVD and EMC standards
Who this is for
- Existing Lumatek Zeus owners looking to squeeze more yield and control growth morphology
- Growers running multiple plants where stem fill and leaf expansion directly improve final harvest weight
- Commercial vegetable and leafy crop producers (tomatoes, peppers, cucumbers, microgreens) who rely on supplemental far-red research
- Tent growers who want to extend their spectrum without replacing their entire lighting rig
- Anyone wanting to experiment with the Emerson effect without guessing what equipment pairs together
Our take
This kit removes the faff of sourcing compatible far-red bars separately. Lumatek's passive cooling and daisy-chain design mean you're getting grown-up supplemental lighting, not a budget bolt-on. The research on far-red is solid — applied correctly, it delivers real results in stem development and photosynthetic efficiency.
If you're running Zeus and serious about pushing performance, this is worth picking up while clearance stock lasts. All the cables, drivers, and integration work are sorted. Plug in and let the spectrum do the work.
