Simplify the following text for a Grade 8 native English-speaking person.
Original: In the first stage , light-dependent reactions or light reactions capture the energy of light and use it to make the energy-storage molecules ATP and NADPH . During the second stage , the light-independent reactions use these products to capture and reduce carbon dioxide .
Simplified: Light-dependent reactions - which need light to work - and light-independent reactions - which do not need light to work .