Question

there is a bulb and it is written on its packaging that the life of the bulb is 20,000 hours.
How long will the bulb last if the bulb is in use for 24 hours all the time?​

Answer 1

Answer:

Typical Average Rated Life for Various Types of Bulbs

Incandescent 750-2,000 hours

Plug-in 10,000-20,000 hours

Screw-based 8,000-10,000 hours

Halogen 2,000-4,000 hours

LED 40,000-50,000 hours

Answer 2

Answer:

2,000 hours at L50 indicates that 50% of light bulbs had failed at 2,000 hours.

5,000 hours at L70 indicates that 70% of light bulbs had failed at 5,000 hours.

12,000 hours at L80 indicates that 80% of light bulbs had failed at 12,000 hours.

20,000 hours at L95 indicates that 95% of light bulbs had failed at 20,000 hours.