Pop each tea light into a heat safe holder with sides. One tea light is perfect for a small room. For larger spaces, light a second and enjoy the slow, steady glow. Expect around six to eight hours from each cup. Keep away from draughts, never leave a flame unattended, and let each tea light cool fully before you move or replace it. If you want instant impact, add a light spritz to prime the space, then settle into the gentle scent and glow.