Temperature

Si te preocupa la temperatura puedes hacer que el ventilador apunte hacia arriba desde el suelo haciendo que el calor suba y no baje hacia tu planta. Aun asi la iluminación LED no emite demasiado calor como para un problema muy grave. Bendiciones y alegría para ti y tus cultivos

Temperature might get a little to hot with a 240 watt inside that grow box. Do you have any holes inside the box to bring fresh air into the grow space?

Be very careful how you water. Keep in mind that the very small plant is only using a small amount of water right next to the plant. Watering the whole pot can be dangerous as the soil around the plant becomes over watered. With a sprout only water immediately around the plant. Water slowly so the water can soak down, deep into the soil. Water again when the sprout starts to sag or droop or when the soil at the base of the sprout is dry down about 1" (2.5cm). As the plant grows I water 3-4" (6-10cm) beyond the leaves. The roots grow out seeking moisture so you want the soil beyond the plant moist to encourage root growth. Always water slow and long. Give the water plenty of time to soak in. When your plant gets bigger lift the pot before you water. You want to learn how heavy it feels when it is dry. With time you will be able to get an idea by weight if the soil needs watering. In the future a fabric pot makes watering easier. The fabric lets water drain away easily. You can see and feel the outside (sides and bottom) get wet as you water so it is easy to tell if you need more. Because oxygen can get to all sides root rot is very rare. And, because the roots can get a good supply of oxygen, with proper watering the roots will densely fill every bit of the pot which is great to maximize yield.

Your diary says your day time temp is 59°F, so if anything you should be trying to raise the temp, that seems pretty low, also I would raise the light a bit, 11.81" inches is kinda close for a two-week-old plant, try raising it to about 18-24" inches.