I have just bought a used iMac G5 with ambient light sensor and have downloaded lots of documentation. Nowhere can I find anything that mentions the purpose of the ambient light sensor. I assumed it might affect the brightness of the screen but shading it or shining a light on it has no effect.
Not an earth shattering question - just curious.
eMac - USB 2.0, 1.25GHz, 768MB RAM, 40GB HD, Mac OS X (10.4.9), ext.HDs - 300GB Maxtor One Touch, 500GB WD; iMac 350 Blueberry, 256 ram, 10GB HD