mc130p
Well-Known Member
I posted the article last year or the year before....can't remember where i found it though.....Right on Brother. That's What I Thought You Were Talking About And That's The Exact Reason I Grow At Night Indoors. Look At My Last Pic I Posted Time Stamp list 11;40 Pm My Light Come On At 7 Pm. Notice The Difference In Temps. Now When It's A Steady 100 Plus Degrees Outside I Let Things Progress Naturally However In The Fall I Will Turn Off My AC When I Get Up And Swing Back By My Grow Room About 8 Hours Later And Turn It Back On Lowering The Temps For Night Time Growing.
I Still Want To Read Those Articles If You Can Find Them
Found it and the discussion with Groerr:
This one is focused on temp differences and R/FR effects, would be cool to try that negative DIF environment, 25% increase in bud would be nice - lol. That second link I posted has a good explanation of the light temperature (K) if I'm getting it right. It's suggesting that the greater the difference in colour between veg and flower lighting, the greater the stretch. That lines up with my thoughts on having the different light sources for veg/flowering. Good discussion, unfortunately it doesn't help @Carolina Dream'n but good info on this.
I couldn't find that one, but I found this full text, which cites that one:
http://www.sciencedirect.com/science/article/pii/030442389190161Q
Stem elongation and flowering of the long-day plant Campanula isophylla Moretti in response to day and night temperature alternations and light quality
Roar Moe a, Royal D. Heins b, John Erwin b
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doi:10.1016/0304-4238(91)90161-Q
Abstract
Stem elongation and plant height at flowering in Campanula isophylla Moretti were greater when plants were exposed to far red (FR) light or light from incandescent lamps which had a low red (R)/FR ratio (0.7). The difference in final stem length between FR- and R-light-treated plants was greatest when the light treatments were given during the entire night or as a 3 h end-of-day (EOD) lighting period. Only minor differences existed between R and FR light treatments when plants were given light in the middle of the night. However, FR light suppressed lateral branching compared with R light. The reduction in plant height as a result of a lower day temperature (DT) than night temperature (NT) was nullified by day-extension lighting with incandescent lamps. With fluorescent lamps (R/FR ratio 4.2), plant heightwas significantly less at 15/21°C (negative DT-NT (DIF)) than at 21/15°C DT/NT (positive DIF). Continuous lighting (CL) during the entire night or with 3 h night interrupttion (NI) treatments with R or FR light immediately after the middle of the night was equally effective at inducing flowering, and much more effective than EOD or end-of-night (EON) lighting. DIF had a slight influence on the rate of flower development, but negative DIF grown plants had 24% more flowers and flower buds, and 26% higher dry weight, than positive DIF plants. Practical applications of light quality and negative DIF treatments for the production of high-quality pot plants of C. isophylla are discussed.