MajorGoodVibes
Member
I've got seedlings that are about 4 inches tall and two weeks old. They're under a 220W 6400K CFL getting 19 hours of day and doing fine but I'm worried about the temperature. The overnight temperature is getting down to about 52F (11C). Which would be a better option: upping it to 24 hours of day or putting them under (and very far from) a 400HPS 2400K light? Or something else still... Any suggestions are appreciated.