How many AGLEX 420W COB Grow Lights are needed for a large greenhouse?

To provide uniform coverage for a large greenhouse, you will typically need 4 to 8 units of the AGLEX 420W COB depending on your specific ceiling height and the desired light density for your crop. Because the AGLEX 420W COB is a high-output COB LED grow light—a specialized fixture that uses a single large diode to provide intense, focused light—the number of units is dictated by the overlap required to eliminate “dead zones” in a large-scale space.

The AGLEX 420W COB features a 90-degree lens and COB technology designed for 98% light source absorption, which concentrates power into a specific footprint rather than a wide, diffuse wash. Based on the research we conducted on the LED fixtures we evaluated, these high-precision lenses mean intensity drops off rapidly outside the primary beam, requiring a tighter grid layout than standard multi-diode strips. For large greenhouses, you must calculate your layout based on the 2000W total output capacity and the heat dissipation requirements of the large aluminum heat sink and big fans cooler. Because COB arrays generate intense localized heat, you must ensure your ventilation plan can move enough air to prevent thermal throttling, which can stunt plant growth or shorten the LED lifespan. We also noted that while the unit includes a veg and bloom switch, it does not offer a continuous dimming range, meaning you must be precise with your initial placement to achieve even light levels across the entire floor.

What to Check Before Buying the AGLEX 420W COB

Before ordering these fixtures for a large-scale installation, verify these technical requirements to ensure the greenhouse infrastructure can support the load.

• Confirm your total electrical load and ensure your circuit breaker capacity can handle the amperage of multiple units running simultaneously.
• Verify the weight limits of your overhead structure to support the fixture and its large aluminum heat sink.
• Consult the manufacturer’s support page to determine the expected lifespan of the LEDs before the PAR output begins to degrade.
• Check the specific mounting hardware requirements, as high-wattage fixtures may require reinforced hanging points.
• Verify the daisy chain connection requirements for multiple units to ensure stable power distribution across the greenhouse.

Comparing the AGLEX 420W COB to Other Options

The AGLEX 420W COB is designed for users who prioritize high-intensity, concentrated light and a simplified “veg and bloom” switching system. If you are operating a small hobby space or a multi-tier rack system where light needs to penetrate deep into dense foliage, you might consider multi-diode arrays which offer a more even, wide-area distribution. However, for large-scale greenhouse production where you need to hit high PPFD thresholds over specific zones, the high-power COB technology provides a more efficient way to deliver concentrated energy. If your greenhouse requires a highly customized light spectrum or a wide, uniform wash across a massive area without overlapping beams, you may want to look at professional-grade arrays that offer more granular control over individual diode outputs.

If you are working with a smaller footprint, see the best grow lights for 3x3ft space to find the ideal setup.

If you need a high-output, concentrated light source for a large-scale operation and have the electrical infrastructure to support high-wattage COB arrays, the AGLEX 420W COB is the right choice for your setup.