Ppfd, IR and UV switches

if 'turning on' the ir/uv doesn't also add watts, the white diodes are sharing some of that electricty. umol/s PAR is a specific range of wavelenths and uv and ir are outside of that, if i recall. So a portion of electricity goes from producing PAR to ir/uv wavelengths. if watts adjust proportionally while turning that stuff on, it could be a reflective of the error invovled with phone apps. A phone app is not a quantum meter. It can measure lumens then convert using some stock conversion factor that will not 100% represent all SFD accurately. Since most grow lights nowadays aren't too drastically different in this aspect, it's a fairly accurate conversion... maybe less so if using a blurple light. Neither of these gimmicks are proven to do anything, so i wouldn't worry too much about it. Think uv has more promise than IR. If uv helps, you only want it applied when trichome production really kicks in, anyway. it damages the plants and that's the supposed benefit, so using it beforehand only damages the plants and allows them to build up resistence to UV - adaptation - which will reduce the effect later -- assuming it has an effect that outweighs the damage. Definitely have a way to turn off UV before exposing your skin or eyes to it... UV is definitely all bad for you as opposed to the 'maybe' benefit to the plant. As far as toomuch light... if you still have vege growth occuring you'll quickly see the effect in new growth -- the internode spacing will change due to different light levels and therefore and excellent way to determine if it's not too much. i don't know if light outside of PAR "tires" the plant teh same way excess PAR does. I wouldn't want to assume either way. If your nodes start getting tigheter, maybe dial it back a few percent to match the growth pattern you had before (or up, whatever it may be) if vege growth has ended or is starting to end, that's more difficult. you'll have to watch closely as pistils form and make sure they don't get burned - little yellow nubs where a hair(s) should be is a sign of too much light on the top colas. excessive purple up top on a plant that is otherwise green is a sign of a bit too much light or more up top.. severity of that effect can vary greatly. i've done it plenty of times and only occassionally did i think it negatively impacted quality of that smoke... once got a bit too crispy, lol, but otherwise a little purple up top seems tolerable. (again, this excludes naturally purple genetics... would be tough to discern what is not caused by genetics in that context) trial and error.. i do agree you shouldn't worry about small percentage differences, but this is potnetially 10-12% different. (-70 / 550 x100% = -12.7%) Tweak light power to match previous growth patterns, and all will be fine.