Name That Deficiency!

These plants aren't doing well. I think some have nute burn and some have a nitrogen deficiency. They were too close too the light, I believe, because their leaves are somewhat rigid and pointing straight up. The room temp is kept between 75 and 85 (f). There is is a standing fan stuck on oscilate in the 8 x 8 grow space, kept on high.

This headband has struggled with discoloration and leaf distortions all its 2 month life. I believe it was over nute-d with 12-26-16 at thrice the recommended dose. Since then it's leaves have looked like this.



This is a lemon haze with some deficiency, I believe. It's been grown in the same room as the headband. This plant is 2 months and has been thammed considerably, which is why it's so bushy. Notice its leaves are uniformly small because they're roughly all the same age.
This is a sister clone of the above lemon haze my friend grew, also 2 months. This is a good comparision since I grew it myself.

Alrighty, what do you guys think? Thanks for reading!

12-26-16 isn't very good for veg, I like around 6-4-7 or 5-5-5 or 4-1-3....

you should check your pH run off

[h=1]Magnesium[/h] Magnesium is a component of the chlorophyll molecule and serves as a cofactor in most enzymes.
Magnesium (Mg) deficiency.
Magnesium deficiency will exhibit a yellowing (which may turn brown) and interveinal chlorosis beginning in the older leaves. The older leaves will be the first to develop interveinal chlorosis. Starting at leaf margin or tip and progressing inward between the veins. Notice how the veins remain somewhat green though as can be seen in figure 15.
Notice how in Figure 16 and 17 the leaves curl upwards like THEY'RE PRAYING? They're praying for Mg! The tips may also twist.

This can be quickly resolved by watering with 1 tablespoon Epsom salts/gallon of water. Until you can correct nutrient lockout, try foliar feeding. That way the plants get all the nitrogen and Mg they need. The plants can be foliar feed at ½ teaspoon/quart of Epsom salts (first powdered and dissolved in some hot water). When mixing up soil, use 2 teaspoon dolomite lime per gallon of soil.

(weedfarmer.com)