The Arcadia Reptile D3+ 7% UV-B Compact Bulb uses just 23W to create a wide flood of energy rich light. Suitable for smaller enclosures with species that require higher UV-B exposure, such as hatchling Agamas. Can be used with the Arcadia Reflector Clamp Lamp range which will maximise usable UV-B output. These compact bulbs are high output, flicker free & use the standard E27 screw thread.