L2 means that the Earth and Sun are roughly in the same direction. JWST orbits at a distance around L2 such that it's actually never in the shade, so it doesn't

L2 means that the Earth and Sun are roughly in the same direction. JWST orbits at a distance around L2 such that it's actually never in the shade, so it doesn't need energy storage and thermal controls other than constant sun in a constant direction. It has an orbit around L2 of roughly 0.8 million km. L2 is about 1.5 million km from Earth. The moon is only 0.36 million km from Earth.