@reza92
and everyone else too
correspondance from Grow Lights Australia,
Comparison Test- very interesting
Hi mate, if you are not already running a UV source such as CMH or fluorescent, we normally suggest the High Light UV boards.
Some growers prefer to run the High Red boards and then add fluorescent reptile bulbs such as Reptisun or Arcadia with 5-10% UVB. Other growers are already running CMH lights and we suggest running the High Red boards to supplement their lighting, as CMH already has a fair amount of UVA (and a very small amount of UVB), but usually needs the red boost that the High Red boards provide to increase yields.
However, a very interesting test has just been completed in the US using our High Light UV boards vs Quantum Boards with added UVB and UVA.
The test results are below and show four identical tents. One tent was a control using Quantum Boards and no supplemental UV. One tent ran Quantum Board 288s with added 6% UVB and 30% UVA Arcadia reptile fluorescent lighting, another tent ran Quantum Board 96s with the same 5% UVB/30% UVA, and finally one tent ran straight High Light UV boards with no added UV.
All the UV tents produced higher THC, CBD and terpenes than the control. But the surprising thing (not that surprising to us), was that the High Light UV boards not only beat the control by 20%, but beat the QB288s with added UV and were just behind the QB96s with added UV. The QB96s have added blue, which can also boost cannabinoids and terpenes (which is why CMH usually outperforms HPS).
Here are the results:
6 x QB96 Elite, 1 x 28 diode FR bar, 2 x 4’ T5 30% UVA & 6% UVB
Total THC: 19.8%
Total CBD: 0.7%
Total Terpenes: 4.7%
8 x QB288, 4 x QB35, 1 x 28 diode FR bar, 2 x 4’ T5 30% UVA & 6% UVB
Total THC: 18.7%
Total CBD: 0.63%
Total Terpenes: 5.0%
8 x High Light UV
Total THC: 19.1%
Total CBD: 0.64%
Total Terpenes: 4.8%
Control – 3'x3' room with 4 x QB96, 4 x rapidled FR pucks, NO UV
Total THC: 16.6%
Total CBD: 0.52%
Total Terpenes: 3.9%
There is a full write-up here by one of our grower partners:
https://rollitup.org/t/thc-cbd-terpene-test-results-uva-vs-uvb-vs-none.1001617/