hmm so my light appears to be the right height from the plants,

Here are some more pictures, the 1 plants seem to be getting worse! what could be causing the yellow patches? it is only near the top of the plant,

on the other plant the leaves are still curling upwards and there seems to be brownish speckles appearing on the leaves (cant really get these to show on the photos

What is this death tent of which u speak?