Light recipes

[Slash]

Has anyone on here ever experimented with light recipes?
I’m planning on giving it a try in a side by side to see if there is a noticeable difference.
I have 3 channel spectrum adjustable lights which consist of a veg channel(cool white at about 5000k), a bloom channel(warm white, red and far red around 3000k) and a UV channel. I have adapted a light recipe from Grand Master LED to suit. The programme is as follows-
Veg stage- veg channel only at required power
First 3 weeks flower- veg channel and bloom channel at 100%
Week 4 and 5 of flower- bloom and uv channels at 100%, veg channel off.
Week 6 of flower- all 3 channels at 100%
Week 7 of flower- veg and uv channels at 100%, bloom channel at 50%
Week 8 of flower- veg and uv channels at 100% with bloom channel switched off.
Normally I run these lights with just the veg channel for veg stage and then everything flat dial for flower.
I’m going to run one as per usual and one with the light recipe and see how they compare.
Should be an interesting experiment.

 

[itchybro]

played around with UV years ago but can't really say it did much but i def wouldn't hang my hat on the playing around i did
interesting that GM suggests using UV mid flower , i would have thought using it in the last few weeks of flower for a few hours in the middle of the cycle would have been more beneficial
is UVA or UVB ?

 

[Slash]

played around with UV years ago but can't really say it did much but i def wouldn't hang my hat on the playing around i did
interesting that GM suggests using UV mid flower , i would have thought using it in the last few weeks of flower for a few hours in the middle of the cycle would have been more beneficial
is UVA or UVB ?

It’s just UVA, 380nm - 400nm so pretty safe to run full time during flowering

 

[itchybro]

ok cool
i think it might be the UVB that would have a greater impact on cannabis compounds , my interest has always been terpenes / flavonoids & anything that might increase / enhance them
def be interested in your findings , keep us updated

 

[Slash]

ok cool
i think it might be the UVB that would have a greater impact on cannabis compounds , my interest has always been terpenes / flavonoids & anything that might increase / enhance them
def be interested in your findings , keep us updated

A mate of mine used a couple of UVA/UVB combo supplemental bars in recent times and ran them 12 hours per days for a week or 2 and got some pretty serious leaf damage. When using UVB, I think any more than a couple hours a day could be detrimental.

 

[itchybro]

When using UVB, I think any more than a couple hours a day could be detrimental.

absolutely correct as i understand it

if you have an issue with low temps indoors in winter you could play with infrared during flower to warm the plant up , you'd need to do some testing on how much intensity to use of cause to not over do it but IR won't do much else as far as i know

 

[Hudo]

Thing that I'm thinking is why the blue light back on at end of flower, natural sunlight has more red in winter, so as the daylight hours reduce the spectrum becomes reder

 

[Slash]

Thing that I'm thinking is why the blue light back on at end of flower, natural sunlight has more red in winter, so as the daylight hours reduce the spectrum becomes reder

I think the main idea is flower density and resin production on the last week of flower. High levels of blue light in the last week helps the plant finish up and creates more terpenes and resin production. Using high levels of blue at the end isn’t a new idea, you can get CMH and MH bulbs in 10000K that are designed to run for the last 1 - 2 weeks of flower. Blue light also plays a big role in flower density so it also likely helps tighten up the flowers in the finishing week

 

[MM2K6]

Loving this post guys! fuck yeah! cool as!

 

[Green Genius]

A mate of mine used a couple of UVA/UVB combo supplemental bars in recent times and ran them 12 hours per days for a week or 2 and got some pretty serious leaf damage. When using UVB, I think any more than a couple hours a day could be detrimental.

Yikes. We like to start around week 6. 15mins either side of on / off for 2 weeks, then 30min either side until finish

 

[itchybro]

Yikes. We like to start around week 6. 15mins either side of on / off for 2 weeks, then 30min either side until finish

i would have gone with turning them on in the middle of the cycle rather than start & end but it's indoor which is far from being a natural environment , either way whatever works i guess
how long have you been running them , UVA or UVB ?
what have you noticed using them ?
are you running a side by side , with & without ?

 

[Green Genius]

i would have gone with turning them on in the middle of the cycle rather than start & end but it's indoor which is far from being a natural environment , either way whatever works i guess
how long have you been running them , UVA or UVB ?
what have you noticed using them ?
are you running a side by side , with & without ?

UVA, mostly a touch of UVB. Almost impossible to get UVB spectrum from LEDs, you need to go fluro tube. Been running over 2 years.

Havent run a side by side test? no. But like most thing, there's probably only a small % gain.

 

[Hudo]

UVA, mostly a touch of UVB. Almost impossible to get UVB spectrum from LEDs, you need to go fluro tube. Been running over 2 years.

Havent run a side by side test? no. But like most thing, there's probably only a small % gain.

A mate of mine messes with UVA UVB hes grown the same cuts as me before but it wasn't a fair comparison because hes one of those blokes that gets stoned reads somthing and tries it out. They have about 50 grow methods pushed on them each run, The poor plants are always sad looking and weed is always average because of it, we call him the plant pedo because he fucks any plant he touches

 

[Green Genius]

A mate of mine messes with UVA UVB hes grown the same cuts as me before but it wasn't a fair comparison because hes one of those blokes that gets stoned reads somthing and tries it out. They have about 50 grow methods pushed on them each run, The poor plants are always sad looking and weed is always average because of it, we call him the plant pedo because he fucks any plant he touches

Opposite problem. Incremental improvements over the years make it hard to pin gains to any one addition.

 

[VinDeezle]

I'd love too see how much UVC is needed to get pink pistils indoors. Always liked that look.

Speaking of UV I have two dual 288 boards here that have 26 uv diodes on a separate channel. Never ran them though so it would be interesting.

 

[itchybro]

just wanted to clarify my opinion , if your using UVA supplementally for a short time at lights on & before lights out i think is a good idea as @Green Genius has done , if your using UVB then using it during the middle of a cycle would be beneficial , both these ideas for the use UVA/UVB would come closer to mimicking natural daylight imo

 

[Green Genius]

I'd love too see how much UVC is needed to get pink pistils indoors.

UVC is EXTREMELY dangerous

 

[VinDeezle]

UVC is EXTREMELY dangerous

Know all about that one. Worked as a sterilization and instrumentation tech for a good while. Add to that years of welding and im just try not to think about it lol.

 

[Green Genius]

Know all about that one. Worked as a sterilization and instrumentation tech for a good while. Add to that years of welding and im just try not to think about it lol.

All good all good. As you have seen, there's all types involved in growing. We automatically default to caution when discussing potentially dangerous items.

 

[VinDeezle]

All good all good. As you have seen, there's all types involved in growing. We automatically default to caution when discussing potentially dangerous items.

More mentioned it to verify that I've copped damage from it over the years firsthand but forgot go elaborate.

Definitely contributed to the mass of skin cancers Ive had removed.

One eyes also permanently damaged as well. Wishing I took it more serious as an ego filled 16 year old trainee with a chip on me shoulder and a whole lot to prove, but at the time the work culture was terrible and I just rolled with it.

20 something years later it's not pretty.