Originally Posted by PCBuds
Is this light bleaching or could it be some sort of ph or nute problem ??
Green plants always need more magnesium, and that's what it looks like.
The sun is a harsher taskmaster than indoor lights, and the plants need more nutrients to grow and overcome the damage. Also, an evenly moist soil (light mulch) means more nutrients are available because plants need moisture to feed.
Also, horticultural fleece (I've used Nortene) prevents a lot of damage, and the plants really take off under it.