Rubber plants like bright light and a lot of it, but not direct sunlight. A sunny spot shielded by a sheer curtain is often perfect for rubber plants. You can tell if your rubber plant needs more light if it becomes leggy, its leaves lose their luster, and lower leaves fall off.
4" Rubber Plant
Sunlight: Requires bright filtered light but can also have only florescent lighting
Water: Water once every 4-5 days making sure soil never feels to dry