LED is too blue/cool

[tareko]

Describe the bug
The colour of the light is too blue, which distorts the view and anatomy.

Expected behavior
There should be a clear view of the tympanic membrane with the correct coloration to give an idea of TM erythema, etc.

Failure Mode
LED has a different colour profile

Effect
It is difficult to correctly assess the colouration of the ear canal and tympanic membrane.

Cause
LED from the BOM is to an Amazon part which ran out. Another one was purchased without specific attention to the data sheet/technical specifications

Mitigation / Control

1. Move to Digikey / Mouser for all BOM electronic components
2. Ensure adherence to change management policy when parts become out of stock (OOS)
3. Stop sale of all otoscopes for the time being
4. Put "DO NOT USE" notice in Readme until the issue is resolved.

[doseofnoor]

I have received similar feedback from a healthcare practitioner: "Bulb color /light is too 'white' and needs more natural yellow color."

[apopanda]

Using the sewable LED PCB, I swapped the emitter to Nichia,NVSW219CT 5000K Min CRI 70.

The question becomes, do we go for a lower Kelvin number to make it yellower? For reference, direct sunlight is around 4800K, halogen lamps are at 3000K, which is what people are used to?