Many modern appliances come with a "Sabbath Mode" which allows observant users to schedule their operation in advance of the Sabbath. For example, many ovens can be pre-programmed to turn on before the Sabbath and turn off sometime during the Sabbath, as well disable their automatic door-lights, to allow the users to comply with the ancient restriction of not starting a fire on the Sabbath.
Similarly, observant users may use artificial light, they just may not turn it on or off. So there are Sabbath lamps where the bulb remains lit but a shade can be lowered to block out the light.
Are these modern cheats to allow observant users to benefit from the convenience of technology while ignoring the tenets of their faith? I'm no reliogiologist, but if these are cheats, they are ancient ones, not modern ones. For example in past times, people would cook before the sabbath then leave the food on a warm hearth with insulation for later consumption.
