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Browse the range on Tonghua Lighting, our main manufacturer website.
Convert a lamp’s rated hours into years for your operating schedule. Compare the effect of usage and the tool’s illustrative temperature scenarios.
Adjust rated hours and operating conditions. Temperature adjustments are simplified assumptions, not a product-specific TM-21 projection.
Enter your LED rated lifespan and usage conditions.
Check the L70 rating on the LED packaging or datasheet.
Hours per day the LED is switched on (e.g. living room 5h, office 10h, warehouse 16h).
How many days per week the light operates.
Choose an ambient-temperature scenario. Actual life depends on the fixture’s thermal design and operating conditions.
Send your fixture list, quantities, and project location for a quote.
Browse the range on Tonghua Lighting, our main manufacturer website.
Rated hours divided by yearly operating hours gives an estimate in years. An L70 rating describes remaining light output, not a guarantee that a complete fixture or driver will keep working for that time.
At 25,000 rated hours, 5 hours/day and 7 days/week, the tool uses 1,820 operating hours/year. The normal-temperature scenario gives about 13.7 years. A 0.60 factor reduces that scenario to about 8.2 years.
Background on fixture efficacy, light quality and lifetime. The planning assumptions shown here are specific to this tool.
See how LED rated lifespan compares to incandescent, halogen, and CFL bulbs. The bar chart scales to your selected LED rating.
The selected LED rating is 25x the incandescent reference life, 12.5x the halogen reference, and 3.1x the CFL reference used in this chart. Compare electricity costs separately with the ROI calculator.
Based on your usage pattern, see how many bulbs and how much money you would spend over 10 years with each technology. LED lifespan is temperature-adjusted.
| Bulb Type | Lifespan | Unit Price | Bulbs Needed (10 yr) | Total Cost (10 yr) |
|---|---|---|---|---|
|
LED (adjusted)
|
— h | $8.00 | — | $0.00 |
|
CFL
|
8,000 h | $4.00 | — | $0.00 |
|
Halogen
|
2,000 h | $3.00 | — | $0.00 |
|
Incandescent
|
1,000 h | $1.50 | — | $0.00 |
Over 10 years, switching to LED saves you $0.00 compared to incandescent, $0.00 vs CFL, and $0.00 vs halogen. On replacement bulbs alone, before energy savings. To include electricity costs, visit our ROI Calculator.
Heat can shorten the life of LEDs and drivers. Ambient temperature alone does not establish the temperature inside a particular fixture.
Temperature-based ageing models require test data and material-specific parameters. The calculator uses simplified temperature factors to illustrate sensitivity.
Do not use the displayed temperature adjustment as a warranty prediction. Compare the manufacturer’s rated ambient conditions, thermal test data, and lumen-maintenance projection for the proposed fixture.
Ideal operating range. Living rooms, offices, and retail spaces with air conditioning.
Kitchens, manufacturing floors, and enclosed fixtures without ventilation. Adequate heat sinking required.
Street lights, parking lots, and facade lighting in warm climates. Aluminum housing and thermal pads required.
Industrial high-bay, foundries, and tropical outdoor environments. Active cooling or derated specifications needed.
Need help selecting the right color temperature for your space? Use our Color Temperature Selector. For room-level lumen requirements, visit the Room Lumens Calculator.
Read the product’s rated hours and the conditions attached to them. Divide by your annual operating hours to estimate years of use. The result does not account for every possible electrical or mechanical failure.
Yes. LEDs can lose output gradually or fail suddenly, and drivers, connections, and other parts may fail independently. An L70 rating concerns light output, not a promise that the entire fixture will operate until that point.
Heat, electrical stress, moisture, and installation conditions can shorten service life. Check the fixture’s ambient rating, enclosure suitability, and surge protection requirements.
Higher temperatures can accelerate ageing, but there is no single temperature-to-life ratio that applies to every LED fixture. Use product test data for a design decision; the factors here are illustrative.
A longer supported life rating may be valuable where access and replacement labour are expensive. Compare the price premium, warranty, operating hours, and likely maintenance costs.
Share your room data, target levels, or calculation result with the Tonghua team. We can confirm suitable models, quantities, and lead time.