PS-10-18: IES Position on LED Product Lifetime Prediction
Issue:
Inconsistent LED product lifetime marketing claims made by some manufacturers have led to questions about the IES methods widely used to characterize luminous flux and color maintenance for the LED components within IES approved testing and methods documents known as LM-80-15 and TM-21-11. Very often these claims are based on violations of TM-21’s ‘6X rule’.
IES Position:
It is inaccurate to make marketing claims regarding the lifetime of an entire luminaire using only TM-21 projections, as this method only applies to the LED components within.
To learn more on this issue, please go to the national website link below.
https://www.ies.org/policy/position-statements/ps-10-18-ies-position-on-led-product-lifetime-prediction
Issue:
Inconsistent LED product lifetime marketing claims made by some manufacturers have led to questions about the IES methods widely used to characterize luminous flux and color maintenance for the LED components within IES approved testing and methods documents known as LM-80-15 and TM-21-11. Very often these claims are based on violations of TM-21’s ‘6X rule’.
IES Position:
It is inaccurate to make marketing claims regarding the lifetime of an entire luminaire using only TM-21 projections, as this method only applies to the LED components within.
- The IES does not support the use of marketing claims exceeding TM-21’s 6X extrapolation limit. Marketing claims leveraging values beyond this 6X limit are misleading and not supported by IES standards.
- The IES does not support the use of LED lumen maintenance life as the sole metric for determining solid-state luminaire lifetimes.
To learn more on this issue, please go to the national website link below.
https://www.ies.org/policy/position-statements/ps-10-18-ies-position-on-led-product-lifetime-prediction