Experiment 2 Procedure: 1 Connect a small lamp to a variable power supply. Set the power supply to the appropriate voltage for the lamp and switch on. 2 Place a light meter at the same vertical level as the lamp on the work bench. 3 Place a metre rule in the space between the lamp and the light meter so that the distance, d, from the lamp can be measured. 4 Observe the reading on the light meter, I, at this distance. 5 Move the light meter to a new distance and repeat steps 3 and 4. 6 Continue the procedure until you think you have reliable data.