First time grower need advice pls...

Im a first time grower i have two clone plants rite now running my lights on uh 18 to 6 using uh fox farm big bloom soil i made a humidity dome out of a plastic bottle and was wondering how long i should use it also one of my plants is looking a little limp pls help thxand also whens the best time to water

i usually keep mine under a dome until u have some nice roots, couple weeks or so, i use rockwool so i dont water them again after there put under the dome until there transplanted. hope this helps peace

I like to water when the light first turns on = ]

If it still an early clone try just keep 24/0 light on it. Ive had mine a few days like that and they are doing fine