Too Much Light?

Can't see any real problems, maybe a toch hot soil mix, but otherwise just fine. Soil looks very dry though..........over watering means watering too often, not growing them in desert like conditions.....half a cup is nowhere near enough. In soil, you need to get run off each time you water, that is, water coming out of the bottom of the pot. This ensures 2 things.........water is going down deep into the pot where the roots are headed to.........and it helps prevent nutrient salts from building up to toxic levels. Small/shallow watering just encourages shallow, stunted roots near the surface, which is also the poorest soil, leading to plants going hungry. Nutrients dissolve and travel down the pot, this is why you want deep watering and a deep root system. 18/6 is optimal too, you will achieve nothing extra by running 20/4......except tired and stressed plants.