LED to much light?

I have 3 autos (afghan kush ryder purple jem and ultraviolet) all under one 240watt blackstar led and 2 300watt cfls I had the light close to the plants but noticed the leaves getting bleached. I raised the lights and it doesn't seem to help is this stressful to the plants? The buds looks and smell healthy but I don't want stress this close to the end any help would be great thanks

*One thing I should add they were under cfls intill the 2nd wk of flowering then I put them under the LED

Cant be too much light. Light can only burn ur leaf if it too close.