I picked up a Sharp GA1A12S202 analog light sensor from Adafruit and figure I could make a tiny contribution by passing on a simple function to read the data from the sensor. The results are returned in “Lux”.
// Get Light Level from Sharp GA1A12S202
int getLight()
{
float rawRange = 4095.0; float logRange = 5.0; int rawValue = analogRead(A0); float logLux = rawValue * logRange / rawRange; return pow(10, logLux);
}