Forced THC Production

Dr. Who said:

I run nothing but 1K's for bloom....T5's and 600's for Veg.

The LED's I mentioned are 730nm only and have a single high Power LED in what looks like a garage Halogen lamp.....Otherwise I won't bother with LED's .....

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bravedave said:

So the HPS is boxed and the MH Is back on for the last couple weeks. Sorry @greasemonkeymann, not set up for 2 bulbs. Thinking my room may benefit from a couple 3ft. T5s on each side of my MH reflector next grow. My 2 rows of 3 plants will set up nicely and I rotate daily up to about week 4 in flower so all the girls will get a good taste.

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RM3 said:

I flower with T5's and use ATI True Actinics for UV and ATI Coral Plus for deep blue

These could be added to grows as supplemental side lighting to achieve the same results
also don't forget the sulfur, it feeds the trics

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greasemonkeymann said:

just get some good airflow in there too, may get kinda hot in there with all those lights

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Letstrip said:

Here in New Zealand theirs a natural hole in the ozone layer letting more UV light through which is pretty cool, always grow good weed outside here, even the average looking shit shit can be quite good. Imagine growing up at 2500ft over here like you guys mentioned!

Found this interesting

The ozone layer acts as a natural filter in the atmosphere, which protects plant and animals from the increased UV irradiation from sunlight. Annually, scientists from around the world come to New Zealand to examine the impact of high UVB sunlight on plants and animals due to this natural hole in the ozone layer.

From comparative research, it has been shown that New Zealand has a 40 percent greater UVB light level than its geographically matched location (latitude, longitude and altitude) in the Northern hemisphere.

For those who enjoy the unique lifestyle offered in New Zealand, the higher UVB levels require summer time precautions such as protecting the skin with sunblock, and wide-brimmed hats. But what has been discovered is that plants also take precautions to avoid over-exposure to UV light.

Plants do this by producing secondary metabolites. These include bioactives such as flavonoids, phenolic compound, alkaloids, essential oils etc, as well as phytoestrogens, which are considered to be important compounds often exhibiting human health benefits. These groups of compounds can act as plant sunscreens and provide protection for the plants against UVB radiation[ii].

Benefits
Because of its greater UVB light level, New Zealand-grown plants produce compounds that can potentially improve the overall health of the human diet because these natural bioactive compounds exhibit potent antioxidant and other functional properties that promote health.

For example, on average one kilogram of Bing sweet cherries grown in New Zealand will have 238 percent higher levels of anthocyanin (red colour pigment, which is known for a variety of health benefits including cardiovascular health) and a 290 percent increase in antioxidant capacity (measured using oxygen radical absorbance capacity or ORAC) when compared to one kilogram of Bing sweet cherries grown in the United States[iii].

As further evidence of this UV effect, in 2011 a research scientist from ARS Western Regional Research Centre in California published a report that showed a moderate dose of UVB light given to fresh, sliced carrots for 14 seconds can boost their antioxidant capacity threefold.

The research went on to explain that exposing carrots to UVB light causes a stress response and these plants respond by increasing their production of natural bioactive compounds including plant phenolics. Some plant phenolics, such as those found in green tea, are powerful antioxidants with a range of health benefits[iv].

According to these researchers, the idea of using UVB light to enrich the bioactives and antioxidant levels of fresh produce such as fruits, vegetables or other medicinal botanicals present exciting opportunities for further investigation.

https://www.nzte.govt.nz/archive/en/news-and-media/news-and-media/features/hole-in-ozone-boosts-health-properties-of-nz-plants/

Also this fact was quite interesting! Bad for us but good for our weed

New Zealand’s death rate from skin cancer is about 300 per year, the highest in the world relative to population (and over half that from road accidents). This is due to the relatively high UV exposures and the high number of fair-skinned people. Peak UV intensities in New Zealand are about 40% greater than at comparable latitudes in Europe.

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HolyGhost23 said:

okay so I did some experimenting. I wish i still had the pics but i moved and lost a lot of stuff.. but I used a 420nm t5 and a 10,000K t5 with 300W's of Cree CXA LED.. I noticed that trics were forming on the seedlings of plants I had with UV vs not. and when i added the light 2 weeks before harvest vs not.. the results were visibly different. I could see more tric development from the plants under the UV vs just LED.

so yes I think adding UV light to a grow does make a difference. and a good one at that. though i have noticed that too much UV light will hurt. as to what the limit is. I dont know. the 10,000K light might help as well.. as coral seems to like it.

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