OK Well inkbird controller has 2m probe s can run the probe to the wsm from inside and keep electric connections inside, and run simple bulb and hard wire form the bulb int he wsm to inside plug to give the heating. Easy I think. Will give it a try. Might need bracket to mount bulb which is a bit more challenging inside a wsm but maybe get a stand to go next to the maze will stop it smoking up the bulb, no that would change the heat output and the light output does not matter?
Just bought the relay controller.
https://www.amazon.co.uk/gp/product/B00IJ0F2OW/ref=ox_sc_act_title_1?smid=A1MZXMWDS73ECR&psc=1
Can rig up bulb and wire cheaply myself, Wonder what watt 100 w, would or something smaller to give more fine control when temp hit.