Mars Hydro TS3000 - Diming Drying Issue

Based on the light intensity readings provided by Mars Hydro, you should hang the light at the following heights during each plant growth stage, at 100% power: Seedling: 36 inches Vegetative and full life for autoflowers: 30 inches Flowering: 20 – 24 inches

Stop guessing and check with a light meter and figure the dli out, check the ppfd,probably too high,hard to say without pics. This app with calculator will give a rough idea https://growlightmeter.com/calculator/ I don't recommend using the app without at least roughly calibrating using manufacturer figured and height. Light meter would be best. It's a good light ( i have one) but very central with its footprint. Temperature and RH are also important, both day and night figures of combination can mean plant stress day and or night, VPD. Most people make the mistake of mounting the driver to light in tent with Mars,this is wrong,it raises temps and fries the driver and dimmer over time, off light for tent, on light for daisy chain in large area. Nobody can guess the answer

Crank that puppy back up to 100%, but set it at least 24"(61cm) above your canopy. If it seems like your plants aren't getting enough intense light after that, set it 1.25cm closer to the canopy until you find that sweet spot for your cultivars. Good luck!

If your plants are not getting enough water they will dry out. You may need to water more. Are your plants showing signs of light damage?