Option 1: A candle. A candle does not convert electrical energy into light energy. Instead, it produces light through a combustion process. The heat from the flame melts the wax in the candle, which then vaporizes and reacts with the oxygen in the air, resulting in a chemical reaction that produces light.

Option 2: A light-emitting diode (LED). LEDs convert electrical energy into light energy. When an electric current passes through the LED, electrons move through the semiconductor material, releasing energy in the form of light.

Option 3: A laser. Lasers convert electrical energy into light energy. They work by stimulating the emission of light through a process called stimulated emission. This involves exciting atoms or molecules with an injection of energy, which causes them to emit light.

Option 4: A television set. A television set does convert electrical energy into light energy. The screen of a television set is made up of pixels, each containing tiny red, green, and blue phosphors. When an electric current is applied to the pixels, the phosphors emit light, creating the images on the screen.

In conclusion, option 1, a candle, is the correct answer as it does not convert electrical energy into light energy.