When to lower light intensity?

lower? crazy talk. Maintain as much as you can give without causing damage. Light powers growth. less light = less growth. ripening is "growth", maybe, in extreme contexts of out of whack environmental variables you might find a situation or two that would benefit from less light at some stage near end.. but that's self-inficted. sometimes a bit too much light takes weeks to show a hint of damage.. if you see blearching or light damage on leaves, that's a good reason to reduce it.

In the last 10 days, you can lower the light to encourage senescence in the plants. If you measure it by PPFD, you should give them 600-700 ppfd by lowering the dimmer or reducing the light schedule to a maximum of 11 hours.

Huh, of course u lower ur light during flowering. When u are in ur last 10-14 days (ripening) a plant doesn't need lots of energy (light) as the plant has expanded its energy building bud. Hard work is done. When buds are hard-shell and no more fattening turn it down so it sits at 6-700

Keep them where they are at until around week 7. Then drop your intensity down to 75% and knock off one hour of light.

Follow this mini guide that you can also see on my profile Mini tutorial PPFD Values to respect: Seedling: PPFD 200-300 Vegetative: PPFD 300-500 Flowering: PPFD 600-1000 Late flowering (last 2 weeks): PPFD 900-1000 WTF is PPFD? 😁 Basically, it's a measure of the amount of light your plant receives. You can have equipment like a lux meter to measure it, but if you don't have one... Do you have a smartphone? Probably yes. Download the "PHOTONE" app on your smartphone, set the app for full spectrum light (or the appropriate one), and measure the light right at the height of the highest part of the plant. It won't be a perfectly exact value, but it will tell you if you're within the desired range or not. As with nutrients, more light does NOT equal a bigger plant or one that grows faster. Here's the link to Photone for Android: https://play.google.com/store/apps/details?id=io.lightray.photone&hl=es&gl=US&pli=1 Here's the link to Photone for iPhone: https://apps.apple.com/es/app/photone-grow-light-meter/id1450079523

i personally from week 6-7 if plants were healthy , drop lights to 30 cm and blast all i can if coverage not compromised. never decreased, just max output on last days, ussually dont stress even if i see burn or heat stress at that time. i smoke buds, not nice or damaged leaves ;) in my current setup i am limited to height, so all diferent, but with space i was doing, like wrote before. nice garden !