a***@gmail.com
2016-05-02 01:30:11 UTC
I am looking around for a best combination of leds to illuminate my planted aquarium. I was looking for some mid/low power SMD leds (< 1W) since those used to yield better efficiency, less heat and thus less cooling equipment, while being suited to my moderate lighting need (freshwater plants require less light intensity than corals). To my surprise, when i browsed the web page of a prominent lighting led maker, ranking all their led family by efficacy, the most efficient appear to be the most powerful ones: 5W upward to 30W, peaking at 140lm/W and they are white leds, are those figures realistic ? Does it still make sense to choose under driven low power leds to achieve best efficiency ?
I am seeking to combine red, blue and white leds to obtain the optimal photosynthetic spectre while keeping a good colour rendering to human eye. How to choose the best efficiency for coloured leds since, as far as I know, the efficiency expressed in lumen/w depends on a convolution function of the own power spectral distribution curve of the subject led with a somehow idealistic human eye friendly power spectral distribution curve, so that blue or red monochromatic spectres generally have poor lumen efficiency.
I am seeking to combine red, blue and white leds to obtain the optimal photosynthetic spectre while keeping a good colour rendering to human eye. How to choose the best efficiency for coloured leds since, as far as I know, the efficiency expressed in lumen/w depends on a convolution function of the own power spectral distribution curve of the subject led with a somehow idealistic human eye friendly power spectral distribution curve, so that blue or red monochromatic spectres generally have poor lumen efficiency.