Calcium deficiency?

pic 1 symptoms are different than pic 2 and 3. too early for a visible Mg-deficiency for pic 1. So, maybe a K-deficiency. that too has spots with interveinal chlorosis. should start at bottom and work upward. The next 2 pics don't looke the same. I'd guess maybe low P or a rootzone issue if you aren't keeping a proper wet-dry cycle early on. More info would help, especially if growing in soilless. Knowing ppms and ratios of what you feed would greatly inform and easily eliminate other possibilities of indescrete visible symptoms. If p is around 40-60ppm, can rule that out. If k is around 180-200, can rule that out.. easy peasy when you have good info. fertigation in soilles -- proper habits -- always fertigate at 1.2-1.5ec overall concentration in a well-balanced ratio of nutes. Always get 10% runoff waste water or more. Wait for top layer to start to dry before repeating. Follow these rules and you can reliably change formula and expect a consistent shift in substrate almost immediately. It also maintains a proper equilibrium in the substrate over time which avoids buildup. Any issues you see is 100% caused by the formula you use. This makes diagnosing issue very easy and the solution very apparent.

No, damage from wetting the leaves when the lights are on. Calcium deficiency will be smalldark brown spots like freckles, not random shaped blotches.