Modern incandescent bulbs are not energy efficient – less than 10% of electrical power supplied to the bulb is converted into visible light. The remaining energy is lost as heat. However these inefficient light bulbs are still widely used today due to many advantages such as:
- wide, low-cost availability
- easy incorporation into electrical systems
- adaptable for small systems
- low voltage operation, such as in battery powered devices
- wide shape and size availability
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