its up to the top and slightly above the top of the tank at the moment - so over 60cm, the light directly over the tank doesn't seem to be affecting it.
The plantlets have sent out more plantlet shoots as well. I've left some of it with them attached giving the discus a few more hiding spots away from direct light. Its a lovely plant, i'll let the tank overgrow for a little and then have a sort out as I'll have to thin out the val, osiris swords and this plant.