...it's not.
Just today I added the following LED lamps to the store:
- Another production lot of our 13W terrarium/plant lights. (30 µmol/m2/sec at 12")
- More Philips Greenpower Flowering Lamps deep red & white. (80 µmol/m2/sec at 12")
- Philips 48" Greenpower Production Modules, also in deep red & white. (60 µmol/m2/sec at 12")
- A new 36 watt, white, overhead plant light. (140 µmol/m2/sec at 12")
Please note that the PPF readings are with a handheld Hydrofarm PAR meter, and should be used for comparison only. The output measurement I have posted at the store for the first lamp 50% more) was done in an independent laboratory using calibrated instruments.