850W high voltage LED with 2.5 µmol/J efficacy, 2125 µmol/s PPF, S4 spectrum, iLOC dimming, and IP66 durability for pro-level greenhouse grows.

The PHOTOBIO CX 2125 347–480V is the most powerful compact toplight in the PHOTOBIO lineup—delivering 2125 µmol/s of balanced S4 spectrum in an 850W slim-profile design. Built for high-bay greenhouses and commercial grows, it replaces 1000W DE fixtures 1:1 while offering better light distribution, deeper canopy penetration, and lower power draw.

The CX 2125 is equipped with premium Osram/Seoul diodes and features integrated iLOC dimming controls, passive thermal management, and a high-voltage 347–480V input for industrial-grade applications. This fixture is tough, efficient, and built for serious productivity.

Is the PHOTOBIO CX 2125 energy-efficient?

With a rating of **2.5 µmol/J**, this fixture outperforms standard HPS lights (typically 1.3–1.7 µmol/J) and even rivals some premium DE HPS units. You’ll reduce energy waste and heat load while delivering more light per watt—translating into stronger growth, higher yields, and lower operating costs over time.

Features

• 2125 umol/s Photon Flux @ 347V
• 2.5 umol/J efficacy
• 850W high power LED with slim vertical profile (24.1L x 14.2W x 2.6H inches) and 22.7 lbs
• Superior canopy penetration by utilizing secondary optics
• Osram/Seoul diodes produce the S4 (Full) Spectrum  
• 1:1 direct 1000W DE replacement utilizing similar footprint
• iLOC Integrated Light Output Control with digital screen for monitoring output levels
• Precisely control photon output when paired with Autopilot PX series controller (PX2 and above)
• Passive heat-dissipating cooling fins
  
• IP66 rated protection against water and dust
• Fully compatible with optional PHOTOBIO AC Power Distribution Tree cabling system - enables interconnection of multiple fixtures on a single power drop - reducing electrical infrastructure costs*

What's Included?

• PHOTOBIO CX 2125 Fixture
• 10' 0-10V Control Cable
• 5 x Eye Hook
• 2 x C Hangers
• Instructions

Download Resources

• Product Manual
• Spec Sheet