The Exo Terra Wire Light has a heat ressitant porcelain sicket designed to withstand up to 150watts. Ideal for use with HeatWave Lamp (ceramic heat emmitors) self-ballasted Mercury vapour bulbs and all types of regular incandescent-bulbs. The wire guard prevents unnessarsary heat build up. The Exo terra Wire Light HeatWave Lamp combine the wire light with the Exo Terra Light Bracket to suspend it securely above any terrarium.