Will a brighter LED light improve the frostiness of the bud?

Rocket Soul · 2025-07-31T09:54:57-0600

HydroLynx said:
Is that 1.81 W/m2 the total wattage of the UV light or the wattage of the UV spectrum of the light?

If i understand the study correctly: nor output nor total watts of uv light; measured uv intensity at cannopy level.

jimihendrix1 said:
I just read about a study that was done, Last Year, released Jan 1 2025, using UVA/B, and the scheme that was most affective, and didnt mess with production ect was.
1.81W Sq/m, and UAV/B was 99/1.
They used multiple lighting strengths, and ratios of UVA/B.
They also increased 3 different chemicals by no less than 22%.

The study tested three UV light spectra at five intensity levels, analyzing their effects on photomorphogenesis, inflorescence yield, and the chemical profile of cannabis. While none of the UV treatments altered cannabinoid concentrations, significant changes were observed in terpene profiles under certain conditions.

Notably, the UV treatment labeled L3_1, which emitted UVA:B at a 99:1 ratio and an intensity of 1.81 W/m², increased concentrations of key terpenes. Compared to the control group without UV exposure, linalool rose by 29%, limonene by 25%, and myrcene by 22%. This treatment maintained consistent yield and cannabinoid levels, making it the most practical option for commercial cannabis cultivation.

Additionally, UV exposure affected growth and leaf morphology. Higher UVA levels increased leaf area, while elevated UVB levels resulted in smaller leaves. However, only the L3_1 treatment was deemed viable for large-scale cultivation due to its ability to enhance terpene profiles without compromising plant yield or cannabinoid content.

The findings suggest that selective use of UV light could help optimize terpene production in cannabis, offering potential benefits for both growers and consumers.
Below is the study’s full abstract. The full text of the study can be found here.

Nice study but a lot to chew thru, and some rather strange stuff: like no mention of what light or spectrum they use for wither main light or uv (though ratios; but uvr8 gene uvb reactivity is hugely varied with which nm targeted).
Only linalool was deemed raised to the point of statistic significance p:0,05, but theres a very strong trend in the rest of the terps. Though if we include the non significant terp numbers then we also have to consider that the L3 control had higher thc than the L3 uv treated groups. Which is strange. Main thing here is that it seems like a little uv goes a long way, even if mainly uva; at least as far as smells and with low light intensity.

medidedicated · 2025-07-31T10:20:51-0600

Im kinda shooting for the same thing this grow but taking a short cut thru genetics. A lot of people getting frosty buds with slurricane #7 S1’s so I got 6 going right now. Just seeing what does it for my environment with better genetics.

Wouldnt then be a good time to see what spectrums to add to get even more frost than that? Youll be the frostiest bag on the block thats for sure. If you want to keep the quality coming Id touch on cloning and mother keeping skills so you always have it for a good while. Before sadly it just is lost so I think preserve or breed into offspring is the only to options.

Its a on going thing it gets deep. Running perpetual clones really set me up to be ready to work on bigger projects. The perpetual line up just allows faster operation so 6 pheno hunt is really like 12 phenos in one grow cycle from start/finish.

Its not as simple as here, buy this uv light and get better results. As the conversation goess you see its just easier to get better genetics first.

Will a brighter LED light improve the frostiness of the bud?

Rocket Soul

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medidedicated

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