Finally replanted them into 1 gallon pots, bit overdue but they are loving it. Planted in Coco, with about 25% perlite and a scoop of worms castings.
Only got a T5 and an 18W led on them (for now) as there's no space in the veg cupboard for them. My plan is to move them back there once my other clones are moved to flower tent.