Leafes curl up

At this stage it could just be normal. Young plants are not always perfect. Potentially a bit too much light early on - hint of chlorosis, but nothing to react to at the moment. Might be nothing. make sure some stem between growth nodes (internode) does develop. If they all stay tight on each other, you need to raise or dim the light and that could be causing a slight fade to top leaves. Allow it to present itself clearly before reacting, though. this looks great for roughly 1 week of growth. "300W | 1819 PPFD" (from spec sheet for ac infinity light) -- this are retarded numbers and makes no sense. it would help if AC infinity didn't lie about their specs. PPFD requires an area to put it into perspective. They are clearing using an area smaller than 1m^2 because no light has a 6umol/J efficacy. that's just bat shit stupid and 2x higher than the best possible light you can make, which ac infinity does not do while running the diodes at roughly 0.33watts per didoe, which is 165% more power than the spec sheet on samsung.com - which means all the specs are exaggerated for the AC infinity light -- this is not unusual. It's still a decent light, but makes it more difficult to give you an estimate on area of coverage for 18hours of operation. it's not 3.14umol/J -- that's nonsense for the above reason and the fact that only the 5000K top bin chip hits that level of efficacy. The light obviously has other CCTs and probably doesn't have the best 'bin' possible, based on other dubious behaviours on their spec sheet... lots of lies. Let's go with 2.7umol/J, but could be a bit lower than that. 300watts x 2.7umol/J x 1w/J = 800 umol/s, give or take. So for autoflowers with 18 hours of operation, this will cover about 1.5m^2 (16ft^2) while giving 35-40 DLI from a hanging distance that isn't bat shit crazy and reflective walls in use. If you have it focused on a smaller area (a free light meter app can help define your light footprint size), then you likely need to reduce the power of the light. e.g. if it's covering 9-10sq ft, you would want it running at 60-70%. This assume reflective walls and proper hanging distance (likely 14-20" depending on how well it spreads to the corners and edges). If you grow photoperiods, stick to 10sq ft / 1m^2 at full power over 12 hours of operation per day. You can see this is all inversely proportional to hours of operation. REad up on Daily Light Integral - DLI. The wiki is sufficient. You don't need to memorize the math. There are DLI tables you can easily find with an image search. Know that it is proportional to hours of operation and size of coverage (in meters-squared). e.g. if a light gives off 500umol/s and is covering .5m^2, that's a PPFD of 1000 -- which you use with hours of operation and a DLI table to find the dLI. OVer 18h this would fry a plant because it is giving 65DLI. 35-40 is your goal with ambient co2 and a loosely controlled environment. Oh and to get 1800 PPFD as their spec sheet says, you'd have to run this light at 100% and hang it at a distance that properly covers 800/1800 = about 0.44m^2 -- And that is relative to 12 hours photoperiod needs... lol. Over 18hours it'd be 2/3rds of that area or about 0.3m^2, i doubt the frame would fit, bwahaha. What a fucking joke they are. it's s decent light, but every light producer lacks integrity lately. Even the once accurately spec'd mars FC series is a bunch of lies now (they turned a previously high-end light into a low-end light with the changes to the 2024 models). A bad trend if forming... it takes smarter consumers to stop it.