
Most smart TVs have an Eco Mode or Energy Saving setting buried in the picture menu. It sounds environmentally friendly and cost-effective — who doesn't want to save on electricity bills? But this setting actively degrades your picture quality by dimming the screen to reduce power consumption.
If you spent money on a good TV expecting vibrant, bright images, Eco Mode undermines that. Your carefully calibrated brightness settings get overridden by automatic dimming that makes everything look duller than it should.