Spider Farmer UV & IR Bars – When Do You Use Them?

I’d start with IR in late veg and run it through the flowering cycle. For UV, I’d wait until early/mid flower and introduce it gradually rather than running it for the whole light cycle. The plants seem to benefit more from UV later in flower than during veg. There’s no need to overdo it — consistency is more important than blasting them with UV/IR all day. Good luck growmie!

Yeah I run the supplement red light bars from spider farmer in my grows , turn it on first day of flower and run it the entirety of flower . Plants seem to love it , bit of extra heat and that . I run the ce500 in a 4x4 and it’s usually a very very full tent so I think that extra 100 w doesn’t hurt getting the girls nice n phat

If it's outside of ePAR wavelengths, it does nothing for photosynthesis. After that, it's just about whether or not it has some measurable stress effect or not. From what i read IR is mostly useless, but does provide some warmth when on. that could help in a cold environment. It might help increase stretch, if that is helpful (context dependent, too). UV should only be used in spurts during flower as the trichomes form in earnest. Do realize it's incredibly dangerous to expose yourself to UV light repeatedly... one-time is not a huge concern but you should take it seriously. HAve a switch to turn it off before opening your tent. There is some limited research that supports it, but it's also important to not the 90% of initial studies never hold up to scrutiny. When we initially research a hypothesis, we are wrong 9 of 10 times about it. Skepticism is healthy. www.youtube.com/watch

ive been using the red ones vertically to help with the lower parts of the plant during flowering where it would be more shaded from my overhead light and it appears to be working well so far :D i put it on when im in the house and remember because I ran out of timers

IR will extend psII so keep it on all times so long as its not above 20-30% of total reds it won't activate shade avoidance. Uva Is one of those tricky ones as it builds resistance the more you give. It doesn't have the same energy as uvb, but you still need to be careful around dosage as it creates alot of oxygen radicals, very similarly to blue light as they share the same photoreceptor. Should be fine just keep an eye as 5k veg shifts to 2-3k, less blues, less repair. Make sure you don't frazzle off the trichs.

I have IR and UV switches on my kingbright 240w. I switch IR after stretch about week 5-6 and UV on the last 3 weeks usually start of adding Advanced Nutrients Overdrive