I could be wrong but it looks mainly heat stressed to me while the yellow spots look like they have been burned by the light being too close combined with the fact that you are misting the plants, so any standing water will increase the burn effect from the light.

How powerful (Watts) is your light and how close is it now to your plant?

Also, what is the soil you are using and what feed are you giving it?

I'm no expert on soil grows, far from it but these answers will help build a picture of what you are doing right/wrong.