4 Pcs 25W Heat Lamp Bulb: 25W heating lamp is suitable for small pets and small pet enclosures. It is designed to provide gentle warmth without easily overheating small animals. Two 25-watt ceramic heat emitters can be used alternately to extend service life. Features: This ceramic heater provides consistent 24-hour heat for reptile habitats. It has an average lifespan of 9,000 to 15,000 hours or more. No Light Emission: Unlike standard heat lamps, this bulb emits no visible light, producing natural sun-like infrared heat. It does not disrupt the animal's natural sleep cycle or affect human activity. Suitable for High Humidity Terrariums: Constructed with a high-strength ceramic element, it is ideal for humid environments. Effectively increases ambient air temperature within the terrarium.