Instead we decided to 3-D print our shell (outer part), because with the two bulb design, a normal flashlight shell wouldn't allow us to fit everything. Finally, we take the wire that is attached to the battery holder (the side that has a bump), and we solder that wire to the other side of the diode that has the resistor attached to it. 

Your brain has an internal clock, called the SCN (suprachiasmatic nucleus). When the brain gets signaled that it is nighttime, the SCN sends messages to the pineal gland. The pineal gland controls melatonin,...