CITAT (Tobb @ 14-01-2008, 21:05)
Men det blåa är bara för att de inte ska ränna iväg?
Typ som en försvarsgrej mot att hamna i skulla?
"Light Spectrums & Colours
Light from the sun is ideal but it's not the same as artificial light, where output quality, spectrum etc varies upon the type of lamp and how it is used. Many growers think that more lumens = better growth / yields, when in fact artificial light, even at its best in a HID or HPS lamp in not so good in terms of colours. Much of the light from the bulb is not used by the plant, mainly because it is not in the 400 to 700 nw (nanowave) spectrum, and plants can only see and use light in this range. Light quality and its colours are as important as lumens.
Light, as seen by plants is not a single colour but separate bands of active colours and the plant senses each colour-band of light as a separate signal. Each band of colour has a different effect on plants and the following are only a few of the functions which each band of light promotes.
Blue Light (350 – 500 NW) powers chlorophyll production, powers cell actively, energies the stomata movement and makes the plant follow light.
Green / Yellow Light (500 – 650 nw) ~ not much action from these bands of light.
Red Light (600 – 700 NW) makes sugar from CO2, powers chloroplast production, signals light and dark times among other functions.Strong blue and red light photons (as above) are also needed for good carbon dioxide uptake.
The PAR scale measures all these coloured photons between 400nw & 700nw, the critical range for plants, as this is only range that plants can use light. If it is not in this range then it's wasted light. "
Citerat från www.envirolites.co.uk
Konstigt f.ö. att glödlampa överhuvudtaget nämns som ett alternativ. Glöm glödlampor! De är energislukare och inneffektiva ljuskällor, samt skapar torr luft och onödig värme! (Har jag rätt?!)
Kompakt växtlampa
14-01-2008, 20:40
