Goohfy Posted March 21, 2023 Share Posted March 21, 2023 Had my uv tube running 1 .5 hour middle of lights on tried to go 2 hours and 3 plants are not happy at all so just a word of warning if you’re going to run uv keep your eye on them because I only upped it for two days and three plants where not happy at all started to burn will put pics up later. The others seem fine different strains different phenotypes bastards.peace Goohfy. Link to comment Share on other sites More sharing options...
Devon Cream Posted March 21, 2023 Share Posted March 21, 2023 I run uv last four weeks and run two hours each day . Grown 9 different strains with no problems sounds I may have been lucky I’m soon changing to two migro units instead. 1 Link to comment Share on other sites More sharing options...
Lux_Interior Posted March 21, 2023 Share Posted March 21, 2023 I thought extra UV-B was best used during vegetative growth (I could be wrong). I think decent LED manufacturers dial this in nowadays. I don't think I'd bother with a separate UV bulb I think the money spent growing a crop could be used better elsewhere. IMHO. Link to comment Share on other sites More sharing options...
Shumroom Posted March 22, 2023 Share Posted March 22, 2023 @Goohfy What make and wattage of UV tube did you get? Are your plants in bloom or veggin? Atb Link to comment Share on other sites More sharing options...
Military Grade Posted March 22, 2023 Share Posted March 22, 2023 (edited) Didn't You only want one UV type for later flower? A or B I can't remember. Edited March 22, 2023 by Military Grade Link to comment Share on other sites More sharing options...
Abbo52 Posted March 22, 2023 Share Posted March 22, 2023 Shane at Migro details the benefits of using uv for a few hours during the end flowering 2 Link to comment Share on other sites More sharing options...
Goohfy Posted March 22, 2023 Author Share Posted March 22, 2023 (edited) 21 hours ago, Shumroom said: @Goohfy What make and wattage of UV tube did you get? Are your plants in bloom or veggin? Atb Micro uvb.Flower last two weeks I wouldn’t use it in veg personally.peace Goohfy.MIGRO NOT MICRO HA HA 18 watts Edited March 22, 2023 by Goohfy 2 Link to comment Share on other sites More sharing options...
Goohfy Posted March 22, 2023 Author Share Posted March 22, 2023 Looked into cheaper ones which now I think would of done the trick.I think they are very strain dependent I.e some plants can take the stresses better than others but that’s my fault running multiple strains in same groom ah well you live and learn.peace Goohfy. 1 Link to comment Share on other sites More sharing options...
Goohfy Posted March 22, 2023 Author Share Posted March 22, 2023 21 hours ago, Lux_Interior said: I thought extra UV-B was best used during vegetative growth (I could be wrong). I think decent LED manufacturers dial this in nowadays. I don't think I'd bother with a separate UV bulb I think the money spent growing a crop could be used better elsewhere. IMHO. I wouldn’t use it in veg personally I recon it would frazzle em and I am not sure what benefit it would give.peace Goohfy. 1 Link to comment Share on other sites More sharing options...
Shumroom Posted March 23, 2023 Share Posted March 23, 2023 Yes, same here, I use my UV LEDs during the last four weeks of bloom Atb 2 Link to comment Share on other sites More sharing options...
Military Grade Posted March 23, 2023 Share Posted March 23, 2023 @Shumroom Is yours A or B mate? I've been looking at some bulbs online but can't remember what one was advised for canna. 1 Link to comment Share on other sites More sharing options...
Shumroom Posted March 23, 2023 Share Posted March 23, 2023 It's mostly B which is the dangerous one But it also produces some A(purple) Atb 2 Link to comment Share on other sites More sharing options...
Lux_Interior Posted March 23, 2023 Share Posted March 23, 2023 22 hours ago, Goohfy said: I wouldn’t use it in veg personally I recon it would frazzle em and I am not sure what benefit it would give.peace Goohfy. I was thinking more established late vegetative stage, vigorous growth, mimicking the height of summer light levels then ease-off when flowering starts to get established. I'm probably a mile off. I have no personal experience of using UV lights. Link to comment Share on other sites More sharing options...
Goohfy Posted March 23, 2023 Author Share Posted March 23, 2023 (edited) Yeah uv increases thc and terpenes in late flower stage.Up to 35% more thc and terps. Edited March 23, 2023 by Goohfy 1 Link to comment Share on other sites More sharing options...
Devon Cream Posted March 23, 2023 Share Posted March 23, 2023 Just now, Goohfy said: Yeah uv increases thc and terpenes in late flower stage. Thc increase was noticeably more for sure 1 Link to comment Share on other sites More sharing options...
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