I LED spots 7Watt in use and expected with the Philips lamps twice the brightness in about. But was absolutely not the case. The dark phase at a start ESL lamp's ok, that's so, but really bright she was no longer even. Were in my system then said 7Watt LEDs and the lamp-reviewed here side by side.
But under the Philips remained unerwartert significantly darker than under the LED. As for the carnivores is the light of the most important parameters besides demineralized water, I control the light with a light meter
Under the Philips lamp I measured at 28 cm distance (reflector glass to the substrate) on the substrate of planting 21300 lux and the LED lamp 35300 lux. This has already shaken me. Theoretically the Philips lamp swallows thus 54.4% more electricity and at the same time brings only gerdemal 60.34 percent of the emitted brightness compared to the LED.
That's quite a coarse disproportion, but not a technical defect, but the result of technical development. The ESL lamps are just overtaken by development and were hustled from the LED lights from the throne.
Due to the mentioned disproportion that existing lamps consists in increased power consumption and lower performance than already, I send back lamps.
The delivery was made by Amazon super fast, accurate and excellent packed. Similarly, the withdrawal, postage free shipping return was as exemplary as it is usual with Amazon has always been.
