Is it my plant has light burn or did I over heat i...

Seems like a heavy Nitrogen (N) toxicity and a slight Potassium (K) Deficiency - Deep dark foliage with tip chlorosis (burns), and lower foliage suffers from interveinal chlorosis (yellowing from margins inward while venation remains green). The fertilizer you are using right now might be good for other fruit/vegetable plants but not for cannabis! try getting a flower/bloom fertilizer with a high PK dosage (N-P-K values on the label) for now and in future grows get fertilizer sets designed for cannabis. In the meantime lower the fertilizing dosage to about 0.6-0.7ml.l and make sure you water with pH balanced water and with at least 20-30% runoff!! Hope this helps! Good luck and happy growing :)