Desertboy
- 1,416
- 263
Bump
would this
be what I want?
would this
be what I want?
the 740nm is perfect. Ed suggests 730nm in his book.
good luck and please, please start a log so we can all follow along. :)
I rang Philips the wavelength is 740nm, I've ordered one from the only supplier in the UK AFAIK.
- Wavelength
725 (min), 740 (nom), 750 (max) nm
Photoperiodism in a Short-Day Plant
Experiments with the cocklebur have shown that the term short-day is something of a misnomer; what the cocklebur needs is a sufficiently long night.
These response are mediated by phytochrome.
- Cockleburs (adapted to the latitude of Michigan) will flower only if they have been kept in the dark for at least 8.5 hours — the critical period. (A and B).
- Interruption of an otherwise long night by light — red (660 nm) rays are particularly effective — prevents flowering. (C) unless
- it is followed by irradiation with far red (730 nm) light (D). See spectrum of electromagnetic radiation.
- An intense exposure to far red light at the start of the night reduces the dark requirement by 2 hours (E).
Are these only available in UK? How much did it cost you? looks like 50 bux a bulb?