Kratom needs at least 70 for decent growth, so I've got to keep it warm until it's well established. It grows too slow to tell if the LEDs did much. As soon as my temps get close to 80 I'm going to switch to the LEDs and one or two cheap CFLs. I'm going to put the CFLs on the sides of the box and see if the plants grow towards the CFLs or up to the LEDs. My array of led bars covers the entire growing area so this should be effective.