Below is a picture of our setup which seems to work and covers all of the above.

  Top Light

One of the attractions to me of keeping lizards is the control of the environment. I try to emulate nature as much as I can the vivarium above is the culmination of my efforts to date not to say that things change and blunders have been made. Below is a list of components with a brief explanation of their purpose.

(1) Active UV Heat Lamp - The latest addition to the Vivarium is the 100w UV Heat Lamp which is on all day and supplies Natural Sunlight Vitamin D3 UVB / UVA and Heat. Bone disease is a constant threat due to the lack of real sun light which the lizard needs to produce D3 this lamp will supply all his D3 needs. The lamp also supplies a good part of the lizards heat requirements.

(2) Low Volt Spots - The Low Voltage Spots are not a specialist item and are available from most D.I.Y stores. These spots produce little in the way of heat and are mainly for lighting up the dark area's of the Vivarium.

(3) UV Flor. Tube - The UV Fluorescent Light that the above Heat Lamp replaced has as you can see been left in the Vivarium. It now has a new job the tube has been rigged up to a timer which turns the light on at 10 in the morning and off at 3 in the afternoon this is a attempt to emulate midday light levels.( an experiment if you will )

  Top Ventilation

Ventilation and cooling are both provided by a fan  (7) Expelair Fan which is controlled by a standard central heating room stat (4) Ventilation Thermostat . The fan has two speed settings so cooling can be regulated. When I purchased the Active UV Heat Lamp I discovered that the Vivarium was over heating so the fan now cuts in and draws the hot air out, so cooling the Vivarium and changing the air.

For added ventilation during the summer a grill of fine mesh can be added. This slots into the front glass runners (pic below).

  Top Heat

Heat is supplied primarily by the Active UV Heat Lamp and supplemented by a 100w spot which is located next to the heat lamp. All heat is produced at one end of the Vivarium so giving a good temperature gradient. The temperature is controlled in two ways, by expelling the hot air via a fan located in the top of the Vivarium which is controlled by a room stat ( see Ventilation ) and by a electronic temperature controller (8) Heat Control Thermostat this gives fine control of the 100w spot and has a (5) Temp. Probe located at the cold end of the Vivarium. Night heating is supplied by a 40w (6) Mat Heater this has its own thermostat set to 20 F (9) Mat Thermostat.