seems youve got em to close to the heat, what bulb u using at the mo, they dont like heat, if you stick your hand under the light asif it was the plant, and u can feel the heat, move it up a bit, there delicate at young ages, and if your leaves are peffing up, means they either need more water,and less heat, they just like light, whats your temps, keep it at a rough 20 degrees, and at night just a tadge less say 15, what i use for plants like this i s a bulb called an envirolite , there spot on givce of so much light they blind u ,and no heat at al, well ok a TINY bit, but there spot on, have u got reflective sheeting around the grow space, never use tinfoil, use whilte mylar sheeting, 70 %reflective, really good,
happy growing , dave