The IES has added a Standards Toolbox to their web site that features an online TM-30 and TM-21 (projected luminous flux maintenance, i.e. LED lifetime projections) calculators, an interactive illuminance selector (for subscribers to the IES Online Library), and an IES Reference Retriever where members can access all of the documents, articles, and papers referenced in various IES documents.
Of course, I’m most excited about the TM-30 calculator which imports and exports spectral data and reports in a variety of formats and increments, and will always be the most up-to-date version. As a bonus, the calculator’s code is also available for download on GitHub, which may be of special interest to manufacturers who want to bring calculations in house instead of doing them online.
The TM-30 calculator includes CIE S026 Alpha-Opic calculations (CIE S 026:2018. System for Metrology of Optical Radiation for ipRGC-Influenced Responses to Light) and output, and is expected to include additional spectral calculations in the future.