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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only
Top view of two red Photontek 50W FAR-RED LED bars laid side by side, one labeled with the product name and wattage in white text on the casing.

Photontek 50W FAR-RED LED Bar

by Photontek
$169.00 - $169.00
$169.00
$169.00
$169.00 - $169.00
$169.00

🌿 Free shipping on U.S. orders $175+, unless noted above

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Add Emerson Effect power to your grow with Photontek FAR-RED LED bar for faster veg, fuller canopy, and high-efficiency yield stacking

Boost Photosynthetic Efficiency with the Photontek 50W FAR-RED LED Bar for Next-Level Growth

Built for serious growers using the Photontek X or XT Series, this 50W FAR-RED LED Bar adds a powerful 701–750 nm spike that takes your spectrum from full to full-throttle. Whether you're running CO₂-rich commercial rooms or dialing in stretch during veg, this bar unlocks the Emerson Enhancement Effect—meaning faster growth, better light penetration, and fuller canopy development when you need it most.

Designed to fit seamlessly onto your existing fixture frames, it's independently powered, daisy-chainable, and engineered to deliver precise far-red exposure without frying your crop. Use it in veg to stretch, early flower to bulk up spacing, or late bloom to push photosynthesis over the finish line. Just follow the application guide and install 2–3 bars based on your fixture and footprint size.

Is the Photontek 50W FAR-RED LED Bar energy-efficient?

This bar delivers 148 µmol/s in the 701–750 nm range with a 13 µmol/s contribution in 600–700 nm, giving it a total output efficiency of ~3.2 µmol/J. That’s miles ahead of old HPS setups (1.3–1.7 µmol/J) and a clear upgrade even from premium DE HPS units. You get more usable light per watt, right where your plants can use it.

Features

  • Promotes stem elongation and leaf expansion
  • Enhance density of your grow area
  • Improve the overall photosynthetic efficiency
  • Attachable to all PHOTONTEK X / XT Full-Spectrum LED range
  • Top efficacy FAR-RED diodes
  • Plug and Play
  • Internal LED Driver
  • Daisy chain connectivity (up to 18 pcs.)
  • Passive Cooling
  • IP65

What's Included?

  • 1 x 50W FAR-RED LED BAR
  • 2 x Stainless Steel Hook

Download Resources

Photontek 50W FAR-RED Video

Specifications

SKU: PTEKLED039

Product Code: PTEKLED039

PPF [400-750] nm: 155 μmol/s

Efficacy [400-750] nm: 3.1 μmol/J

Input Voltage: 120-277 V AC, 50-60 Hz

Driver: 50 W, 120-277 V AC, 50-60 Hz Integrated

Input Power: 50 W (+/- 5%)

Waterproof/Dustproof: IP65

Life Span: L90 > 45,000 hrs

Light Distribution: 140°

Light Source: Far-Red LED Diodes

Dimensions: 39.4” x 1.9” x 1.7” (1000 x 48 x 42 mm)

Weight: 2.7 lbs (1.2 kg)

Thermal Management: Passive Heat Sink

Power Factor: > 0.90

Max Ambient Temperature: 104 °F (40 °C)

Working Temperature: 14 °F – 104 °F (-10 °C – 40 °C)

Working Humidity: 20% – 80% Non-Condensing

Dimmable: No

Daisy-Chain Capability: Yes (Max. 18 Pcs.)

Spectral Quantum Distribution Graph

Light Distribution Curve

Grow Light Central expert advice for indoor growing equipment

Who should use this supplemental LED bar?

  • Experienced growers optimizing morphology, stretch, and canopy fill
  • Commercial cultivators running the X / XT full-spectrum fixtures
  • Science-driven operations leveraging the Emerson effect for max efficiency
  • CO2-enriched environments looking to push photosynthetic boundaries
  • Anyone chasing edge-yield gains in tight schedules or multi-tier systems

Best applications

  • Veg to early flower for enhanced internodal spacing and leaf expansion
  • End of bloom cycle to support PSII and total PPF boost without heat risk
  • 4x4 to 6.5x5 footprints paired with X 465W PRO to X 1000W PRO systems
  • CO2 grows with XT 1000W for full 5x5 canopy exploitation
  • Targeted spectrum extension from 700 to 750nm to activate far-red response

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

FAQs

How many watts do I need for my grow space?

The wattage depends on the size of your grow tent or room. A general guideline is 30-50 watts per square foot for high-light plants like cannabis. For example, a 2x2 ft area may need 100-200W, while a 4x4 ft area may require 400-600W for optimal coverage.

What is the difference between full-spectrum and red/blue LED grow lights?

Full-spectrum LED lights mimic natural sunlight, providing a balanced mix of blue (for vegetative growth) and red (for flowering and fruiting) light. Red/blue LED lights focus on specific wavelengths but may not support plants as effectively as full-spectrum lights.