LUMO - Firmware Update - Instructions at bottom of page
Please read: Update using a Windows PC if possible. Unfortunately, Macs have an issue which sometimes causes the meter to become stuck in update mode but unable to communicate to the computer.
Note: if your firmware is several versions out of date, you can jump straight to the latest version instead of installing each in order of release.
V1.9 - Click here to download
Change notes:
Improved colour temperature reading under incandescent (high IR) and outdoor (high IR + high UV) conditions
Shorter averaged reading times in low light
Continuous mode no longer blocks button presses
Minor text/graphic errors in menu/measurement screens