Watering schedule and light distance.

I've had a Sweet Afghan Delicious on the go for about 2 weeks I have been feeding about 50mls a day and spraying the top of the soil and the light (250HPS) has been about a foot away from the plant she has been thriving under these conditions, I'm just wondering if I should start watering more or moving the lights further away or should I start adding nutrients? Or should I just carry on for a bit longer doing what I'm doing?
 

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