The Crassula Tetragona plant needs at least six hours of sun exposure each day. It can be grown in filtered light, so it is ideal for a shaded porch or patio without direct sunlight.
Place the succulent where it will receive as much indirect daylight as possible and no more than four hours of full sunlight. Make sure the succulent receives at least six hours of indirect sunlight a day. The Crassula Tetragona can be grown indoors under fluorescence or grow lights with care and correct pruning techniques. Place the succulent in an area with bright filtered sunlight for up to four hours, and then give it partial shade or more if you want to protect it from intense direct sunlight.
Source: Garden's Whisper