Great white shark(Jaws)

This past week the cree cob lights came in and I amended the soil and I can see the difference in 5 days. My watering routine hasn't changed but the addition of the macro and micronutrients this past week has definitely promoted growth. Cant wait to see this weeks progress. I have my plants listed as outdoor container grow and I do as much as possible but the evening temperatures here in Alberta are still under10° at night so I bring them in till it warms up enough to put them out in the sun. So my leaves are cupping. I haven't over or underwater them I feel for weight and have a gage. They haven't received high heat still too cool in Canada. Cal deficiency, there is some in the soil. And the leaves feel like paper except bottom leaves that are hidden. I'm thinking lights to close at 18"