Arcadia Reflector Clamp Lamp & Ceramic Holder (E27) Arcadia Reflector Clamp Lamp & Ceramic Holder (E27) – A fully inclusive kit. Contains everything you need to fit Mercury vapour lamps (and also other light and heat sources), over an open table. Using the Arcadia vivarium adapter, you can surely fit it inside a vivarium as well. Multi directional Also features on/off switch Detachable mesh cover Ceramic lamp holder and spun reflector. Ideal for use with our Self Ballasted Mercury Vapour (Sold separately) and also Halogen Basking Spot lamps (Sold separately).