Electrical – Do old fluorescent light bulbs use less electricity

bulbelectrical

I've read that old fluorescent light bulbs produce less light over time.

Do they also use less electricity, or do they use the same amount, but produce more heat?

Best Answer

All lamp manufactures have the lamp curves, as the lamps are started it damages them a little and when running they are degraded but slowly. The industry standard is the lamp is at end of life when the light output is below 50%. Lamp life curve The ballast controls the wattage consumed this stays the same for the life of the lamp until the contacts are eroded and cannot strike. another lamp life example