Inputs
Results
Remaining lumens
--
lm
Depreciation
--
%
Elapsed reference life
--
%
Service threshold reached
--
Service status
--
Calculation details
- Remaining lumens
- -- lm
- Depreciation
- -- %
- Elapsed reference life
- -- %
- Service threshold reached
- --
- Service status
- --
Important notes
- Lumen maintenance is a user-entered or product-derived assumption; product curves may not be linear.
- This is maintenance planning support only and does not declare compliance.
Formulas
- \(\displaystyle \Phi_t = \Phi_0 \times L_m\)
- \(\displaystyle D = 100 - L_m\)
Estimate remaining lumens and depreciation from an entered lumen maintenance percentage and operating hours.
Lumen Depreciation Estimate is a planning aid. Keep the target source, product data, measurement method, and project assumptions with the result. Confirm compliance, installation, certification, and safety decisions with the responsible professional.