@Tuilejuggle, It might be a nitrogen deficiency , can't really till , you an find charts on line to refer to, just punch in nutrient deficiency and google and you should see pictures to refer to, and may find your answer , they don't look that bad to me yet (but)it might be nitrogen def ?? Your lights what i'm look at don't seem too close it's all about the heat and how close they are , try putting your hand on the top of your plant you should be able to till if its too hot ,it would be uncomfortable to you , just move your lights up a few inches and check again until you feel comfortable with the warmth and not to hot , I use all LED grow lights and range them around 18 - 24 inches and of course adjust with growth of your plant and check every day, I hope this helps you some , really sorry I don't have a for sure answer , good luck with your decisions , all the best, I'll check back and see how you do👍
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