Timeguard Digital Light Switch combines the function of a manual light switch, with the option of automatic timed control of lighting on a weekly basis available at the press of a button. There is a further option of starting an automatic lighting period at dusk, but ending it with a timed off, and a random option, based around programmed times. Controls 40-400W of filament, 11-150W low energy (minimum bulb size 11W), 18-76W of fluorescent, 20-200W of low voltage and 20W LED lighting.