1.	Connect the datalogger interface to a PC with the software installed.
2.	Connect the light sensor to the datalogger interface and fix the light sensors on top of the light bulb with the stand.
3.	Start recording the data of light intensity for around 20 seconds with the light bulb turned off.
4.	Turn on the light bulb and keep the datalogger on to record the light intensity for 5 minutes.
5.	Stop recording the data and save the data file for this light bulb.
6.	Repeat steps 2 to 5 with another light bulb.