I throw them in my veg room
so 18/6 or 16/8
I`ve used 12/12 and 24/0 for clones both work
some people say to leave them in the dark for 1 to 4 days so they can root up a bit before being exposed to light as that causes them to dry up
I just never expect to have 100% of them take so I don`t work too hard over them
Like if its much more hassle then a seed, unless its a plant I`m really taken with I won`t go to tons of trouble
Some rooting gel, a slab of rock wall and a tray with a lid, 20c to 30c and rh 40 to 60% seems to work fine, some rooting feed too
mostly how well they take depends on how well you take them and the health of the mother, some boosters really make plants cuttings root a lot easier
like evaponics Mother kare or plant elixir steroids... plants fed that act like ga3 fed plants a bit, they grow straight up and have more internodal spacing, easy to cut easy to root up
once they are rooted I feed a little seaweed or triacontanol to get them to go more bushey if needed... actually swapped out a 600mh (in a cool tube) running at 400w for a 300w 5000k induction lamp (in a home made baking tray reflector) the other day, looking forward to see what that does to my vegging plants and clones