rkymtnman wrote:why the change from 24/0 to 20/4?
Just a guesstimate. 24/0 is certainly the extreme. Of all variables light is only one. While amongst the most important I have a gut feeling a little rest every day may be a good thing.
Says wikianswers:
What happens in plants at night they respire or they transpire?
In: Environmental Issues [Edit categories]
Answer:
Plants do respire at night. It does not require light to take place. This is a process of releasing energy, kind of the opposite to photosynthesising. Photosynthesis is the preparation of the dinner, respiration is the dining process and the belching and flatulence that follows. When a plant respires, it releases carbon dioxide ( at a lower rate than it takes in ), oxygen, heat, water. It occurs on a cellular level with all living things.
Transpiration, on the other hand is the process by which plants release water through their leaves, stems, flowers and roots. It occurs during the process of photosynthesis and gets a break at nightime as plants need light to photosynthesize.
And no lesser authority than the Joint Dr himself while talking about Lowryders in particular said:
Indoors, Lowryder performs very well in soil mix (pots or beds) or in soil-less systems, where it can be cultivated from seed to bud in two months 18 hours of light per day is recommended all the way through. Switching light cycles down to 12 hours may diminish yields and shorten the already-short life cycle slightly.
I went to 19/5 today by the way......