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-   -   Light Wavelength (http://www.hydroponicsonline.com/forums/showthread.php?t=1828)

EarlyPan 11-16-2010 06:41 PM

Light Wavelength
Has anyone ever attempted to measure the LUX at a specific wavelength, for example 630 nm? I,m thinking that if I could use a filter to pass only the light around that wavelength, which seems to be optimum for bloom, then I could compare the various light fixtures and types. No point in pouring on lots of light that the plants can't use, right? The same might be applied to the bluer light for plant growth.

ProZachJ 04-15-2011 03:30 PM

It's not lux you want to measure. You want to measure Photosynthetic Photon Flux Density. (PPFD) I have some specific measurements of 400W HPS, 400W MH, 126W Hydrogrow Penetrator and 126W Penetrator X-Lens. They are some cool graphs if anyone is interested in seeing them.

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