A 1000w led which gives the best spectrum over a large area. The fixture itself is massive (1700 x 1099.6 x 48.2mm) meaning ppfd is high over a large area but not overly high that you would require co2 supplementation. If you require a smaller light which pumps out 1000w of LED power focusing on a smaller area (so ppfd is higher) then check it the Lumatek 1000w extreme co2 pro. Don't get the two confused! The higher specification Lumatek Zeus 1000W Pro LED is a linear multi-light bar fixture with folding frame producing extremely high levels of PPF of 2925 µmol/s and a very high efficacy of up to 2.9 µmol/J. With the advances in technology and fixture performance, high quality LED horticultural lighting is now a credible option offering significant return on investment to cultivators. Lumatek full spectrum horticultural LED solutions balance light quality (spectra) with light quantity (intensity and duration) ensuring an even light distribution and uniform spread. The fixture efficacy will vary depending on the Input Voltage used. The Zeus 1000W Pro produces ultra-high levels of PPFD evenly spread over a 2mx1.5m grow area and a full-spectrum grow light producing consistently high quality & high yield indoor crops. This fixture has a larger rectangular foldable frame with a ingenious array that creates a uniform spread of light at short distance to the crop enabling single source grow lighting for multi-layer cultivation systems, single benches in low rooms and grow tents. The new line of Zeus is built using high quality Lumatek drivers and latest generation top bin LEDs from Lumileds and Osram, generating a full-spectrum light source ideal for veg and flowering cycles. Another new feature of this line is the Clear Glue protection cover technology on the LED bars; resulting in higher light transmittance of 99% without light loss, extended lifetime of diodes, extra corrosion resistance and high waterproof of IP65. For basic maintenance, simply clean the bars with wet cotton. Lumatek is a pioneer on the innovative, modular, magnetic LED light bar design. For different cultivars, propagation and vegetative growth periods the Zeus may be dimmed without losing efficiency. The high efficiency and low powered LED configuration with 10 interchangeable magnetic click LED bars reduces the temperature of the LEDs increasing the output and improving light maintenance. SPEC Product Code: LUMLED009Efficacy: up to 2.9 µmol/JPPF: 2925 µmol/sInput Voltage: 220-240V, 50-60HzInput Power: 1025W (±5%)Footprint: 2.0x1.5mWaterproof: IP65Lifetime: 60 000 hrsLight Distribution: 120°Light Source: Higher Spec Osram and Lumileds DiodesThermal Management: Passive CoolingDimmable: OFF-25%-50%-75%-100% with 0-10V Light Dimmer (Included)External Control: With Lumatek Digital Panel Plus 2.0 or Universal Controller 0-10VWeight: 17.5 KgDimensions: 1700 x 1099.6 x 48.2mmSpectrum: Full Spectrum FBTU (With Driver Attached): 3668 BTUs/h (Max)BTU (With Driver Remote): 3411 BTUs/h (Max)