A bit blurry, but it doesn't look like any heat stress on the plants. It does look like they've been over/under watered though, there's uniform drooping. It looks to me like you can and probably should move the light closer. 3ft is pretty far (IMO). Aim a fan at the light so the air passes over the tops of the plants, it helps a lot. If you can place the back of your hand just over the top of the plants without it being too hot for your hand, you should be fine.

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I don't grow, smoke, buy, eat, look at, touch, or otherwise interact with illegal substances. Everything I say is hypothetical. I'm always just joking.