Hi,

Thanks for the reply. Dimming stats used for keeping reptiles tend to drive either normal incandescent bulbs, or ceramic elements like these



Yes the intention would be to switch 240v AC either through SSR's or zero crossing driven triacs.

So If I follow your drift, a PID routine would still be required, but rather than a low frequency pulse, the filter is used to determin the pulse width in a high requency PWM ?