Are always-on lights and flashlights for photography energy-saving?

Whether electrical appliances save energy depends on the energy efficiency evaluation standard. For example, some refrigerators and air conditioners have their own energy efficiency grade labels.

But as Wangcn11said, flashlights are generally not marked with energy efficiency grades, and the specific reasons may be explained by engineering scholars. However, the power consumption of flashlights should not be large. For example, a 400W flashlight only uses electricity at work. Because of the characteristics of flashlights, you will definitely use less than 0.4 kwh of electricity in an hour. On the contrary, if you use some flashlights with high power, such as 1000W, and use more than one at a time, you should pay attention to whether it will exceed the circuit load. Of course, there is a perfect protection mechanism.

As for the lights that are always on, it depends on the specific lights (light sources), such as quartz lamp, metal halide lamps, LED lamps, energy-saving lamps and fluorescent lamps. Some of these light sources belong to what you call "energy saving", while others are high energy consuming. Moreover, if these lamps are produced by regular manufacturers, the implementation standards and energy efficiency grades will generally be marked on the packaging, so that users can understand the energy efficiency situation, which is specific to you.