We are sorry to hear that you are not satisfied with CT readings. They should be OK and each Lumu Power is individually calibrated before being shipped.
Please try and check a couple of things, so we can see if you really got the faulty one:
- Are you measuring CT with the flat side? You have to use the flat side to measure Color Temperature and Illuminance; and the dome side to measure Ambient and Flash exposure. Be aware of the small pictogram on top of each screen - it tells you which side is measuring in particular mode. You can, of course, plug your Lumu Power in your iOS device in either orientation.
- Which serial number does your Lumu Power have?
- Can you go to general app settings (gear icon in top left corner on the first screen) --> troubleshooting and make a factory restore of your Lumu Power
- What types of light are you measuring, what is the discrepancy in Kelvins?
Let us know about your findings at email@example.com and we'll solve your problem.