Top leaves

My plant's top leaves are turning a really dark green and becoming kinda wrinkly. Is this normal or can this be heat burn?

not normal.... picture please...

ease up on the feeding.. actually don't feed them the next time you water... and if you are growing hydro, I would dilute your reservoir to 1/2 whatever PPMs you are running (just for 24 hours)

cheers

i have it in soil. I have a 400 watt high presure sodium bulb. The temp gets up to 83-84 sometimes during the day. I have the light like 2-3 feet from the plants. Heres a pic of the messed up leaves.
http://i28.photobucket.com/albums/c243/tflr15/100_0480-1.jpg

I have started to see that each plant has starting turning a yellowish color. It started in the smaller pots but now it is showing in the bigger ones. How do I fix this?

People might say, nitrogen deficiency. Sure, that could be the problem... but how have your fertilized the plants? what have you been feeding them? what kind of soil are they being grown in? all things we need 2 know so we can give u our opinions... well, mine atleast, lol

Heard it was becuz of spider mites...
how can i get rid of these bitches... would lemon ammonia work? by puttin cup of it by the plants?