Marica, The photo of adenium in the red cup. This is not leaf burn due to your LED lights. The whole leaf would be effected if it was. This type of leaf tip necrosis is usually due to watering, fertilizer, etc.

Leaf burn from lights is definitely possible, but the leaves closest to the lights would have been burnt and would show on entire leaf surface.

Rick

Hmm. I have never fertilized this seedling. Maybe to little water. It was green when I turned on the light an 12hrs later leaf edge brown. Now some leaves fell off underside. I will look at the roots next, thanks Rick!

My plant looks fine except for the loss of leaves. Soil was slightly damp, watered 4 days ago. Has lost several small leaves underneath. It's 4 months

Marica, the leaves in the photo (plant in red cup) look much greener than in last photo of it out of soil. If it should be damage from you LED lights, then you will need to find out at what distance works for you set up. This plant should be fine if it has only effected the leaves. I do remember Tracy speaking of distance away and too much light when first starting to use LED lights.

Not had any issues with lights on my seedlings to date.

Rick

Thought I would add for a 50w round Led the gals said needs to be 12"-16" away from