Celestial Star & Moon LED Diffuser vs Flame LED Essential Oil Diffuser

Buy the Celestial Star & Moon if you want a bigger tank, a star-and-moon light show and USB charging for a nursery or living room. Buy the Flame diffuser if you want a realistic flame glow, a timer and a small bedside unit. The Celestial's own listing contradicts itself on tank size (200ml in the specs, 400ml in the description), so treat capacity as uncertain. The Flame has a 4.9 rating from 74 owners and a stated 6-hour run time; its description also contradicts itself, claiming both 120ml and 220ml.

• Choose the Celestial Star & Moon if you want a star and moon projection, a larger stated tank and USB power for a bedroom or kids' room.
• Choose the Flame if you want a flickering flame look, a 1/3/5-hour timer and a compact unit that fits a nightstand.