Happy,

If you look at that fixture you linked to, you'll see it is simply an outdoor junction box with a lamp fixture and bulb guard.



You can purchase that exact junction box and light fixture at any hardware store that sells that stuff (all the big stores do.) Now you are left with making your own guard with wire cloth. Since the snakes are large, the 1/2" mesh will work perfectly and will not reflect heat back up to the heater.



That bulb guard you posted has too much surface area and may reflect heat back up from a directional heater like a CHE. That is something you want to avoid.



When making your own bulb guard from wire mesh, make sure to leave at least 2 inches clear from the bulb surface to the mesh.



Your choice is to make a round guard or a rectangular one. Round is easy but you will need to cut round piece for the bottom. Rectangular is easy but you will need a template. Use a large square sheet of paper and cut away a square in each corner. Bend the resulting flaps up. Test for size and adjust. Once you get the perfect template, use that to cut the mesh.



They sell little metal wire clips that are perfect for mounting the bulb guard to the cage ceiling. And since your snakes are big, you do not have to worry about small gaps between the cage top and the wire guard.
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Mark

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