Succulent/cacti Based Terrariums
Succulents like plenty of indirect Bright light. They do well on a window that gets only indirect light all day. Too much direct sunlight will burn the plants as the terrarium can get very warm. A bit of morning direct sun or late afternoon sun is ok, but definitely not the hot midday sun.
Succulent terrariums do require watering. You can spray with a light mist every week onto the base of the succulent not the leaves. Let soil dry-out between watering. Slightly increase watering amount when weather becomes hotter or drier and slightly decrease when cooler. If you notice the leaves shrivelling, it may require more water.
Succulents require little maintenance. To discourage rot, its best to remove fallen leaves from the terrarium. It is also good to allow the terrarium to receive fresh air from open window when possible