From 24h to 18/6h during flowering ok (autoflower)?

Thanks for your answers, guys! @The8thChevron: I thought so too after a while and wish I had done 18/6 from the beginning. @rhodes68: They do in fact not look too healthy (ph problems or something similar). Doing in steps means first ‘night’ only 2 hrs, next night 4, then 6?

If the plants are otherwise healthy it should not be a problem heat can be a real killer Would do it in steps though, less shock the better