ProRep Cloth Element Heat Mat (11×11) 12W Urchins the Exo-Terra Barrel Cactus is

the Exo-Terra Barrel Cactus is a practical choice for terrarium decoration

This life-like foliage is ideal for enhancing the naturalistic appearance of your pet's habitat

but it includes an internal 100W 24VDC power supply as well

use E27 standard screw fitting

ProRep Cloth Element Heat Mat (11×11) 12W Urchins the Exo-Terra Barrel Cactus isProRep Cloth Element Heat Mat (1111) 12W ProRep Heat Mats and Heat Strips are designed for use with reptiles, amphibians and invertebrates. They work by producing ultra long wavelength infra red heat that is absorbed by the animal and cage furnishings in much the same way as the sun warms basking animals or the ground in the wild. This action allows the animals to warm themselves without necessarily raising the air temperature in the vivarium or tank.