Only 1.02 thousand

As we know, the sensor is limited to the maximum value of 1024, is there no sensor which can detect light much more than 1024???

Hi,

The 1024 is not about the sensor, it is about the ADC built into the Bolt WiFi module. The ADC takes an input in the range of 0 to 1v, and converts that into a number in the range of 0 to 1024, since the ADC is a 10 bit ADC (2^10 = 1024).

Also, the value does not have a unit, so you can’t compare it to the output of a light sensor. You can however get a feel of how the light intensity is actually changing.