There are several considerations that need to be made when constructing a solar powered DC lighting design. The lighting will need to be used at night time while the solar power will only be available during the day, this introduces the need of a battery. When using a battery, care must be taken to ensure that the solar panel doesn't overcharge it. A solar charge controller is used to limit the voltage to a range that suits the battery.
Another consideration to be taken, is the power consumption of the lighting. Conventional incandescent lighting consumes a huge amount of power. The amount of power a solar panel would generate during the day would not be sufficient to supply the power. A potential alternative would be LED lighting which consumes alot less power and is significantly more efficient. The efficiency of the LED's could be increased by pulsing them at a rate faster than discernable by the human eye. In this way the LED's would be inactive up to 50% of the time depending on the aggressiveness of the pulsing regime. The student implemented these features when designing the system.