The IES is committed to providing lighting professionals with resources and tools that support your efforts to enhance your lighting knowledge, work more efficiently and stay updated on the very latest lighting standards and guidelines.
TM-35 Calculator
The official IES TM-35 tool projects the anticipated shift in the chromaticity coordinates of LED packages, arrays, and modules over time.
TM-21 Calculator
The official IES TM-21 calculator projects luminous flux maintenance based on the 2021 American National Standard, approved and maintained by the IES Testing Procedures Committee.
TM-30 Spectral Calculator
The official IES TM-30 calculator provides values and creates vector graphics based on the 2021 American National Standard, approved and maintained by the IES Color Committee.