Lumatek - Zeus 600W Pro 3.1 LED Grow Light

The Zeus 600W Pro 3.1 is the heaviest model in this range: 1990 µmol/s at 3.1 µmol/J across six bars, meant for a 150 × 150 cm growing area.

The number in the name is not what your meter reads

Check this lamp's figures against each other and they will not add up. 1990 µmol/s divided by 600 watts is 3.3, while the box says 3.1 µmol/J. One of the two looks wrong. Neither is.

It comes down to which 600 watts you mean. The number in the model name is a class designation, much as 600 watts was a size for HPS lamps for years. What the fixture actually pulls from the socket sits above that, and Lumatek calculates efficiency over that real draw. Divide the output by the nominal figure and efficiency comes out too high; divide by the real draw and the 3.1 holds.

We do not print that real draw here, because Lumatek publishes no figure for it on this model and we are not going to derive one from a division. What you can take from it: if any lamp's efficiency does not reconcile against the wattage in its name, assume a different wattage was used in the calculation and ask. And if you want to know your own consumption, fit a plug-in meter, because that is the only number that describes your setup.

Technical Specifications:

• Model: LUMLED029
• Power: 600 W nominal
• Light output: 1990 µmol/s PPF
• Efficiency: 3.1 µmol/J, calculated over the real draw
• Construction: six bars
• Suited to: 150 × 150 cm
• Cooling: passive, without a fan
• Weight: 16 kg

Frequently asked questions

Why does 1990 divided by 600 not give 3.1?
Because efficiency is calculated over the real draw, which is higher than the 600 watts in the name.

So what does the lamp actually draw?
Lumatek publish no figure for this model, so we quote none. A plug-in meter lets you measure it yourself.

Is that a manufacturer's trick?
No, it is normal in the trade. It only becomes misleading when a brand calculates efficiency over a single diode rather than the fixture.

Could this lamp go in a 120 × 120 cm tent?
You would give more light than the canopy can use. The Zeus 465W Pro is the one meant for that size.

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