The Experimental Set of Light Distribution Analysis by LabView Application

This research presents experimental set of distribution light. Light illuminance is displayed by LabView application. The set was tested by four types of lamp including complex fluorescent (CFL), incandescent, E27 LED (Light Emitting Diode), T8 tubular fluorescent (FL). The 3 types of luminaire are used for testing. They consisted of down light, high bay and fluorescent reflector. The black close room was 1.5x1.5x1.5 m in size. It was constructed by steel and plywood. The center floor of the room is installed by LDR (Light Dependent Resistor). It was used for measuring the illuminance. LabView application was applied to display value on computer screen. The stepping motor was installed to rotate the lamp. It was controlled by LabView through DAQ 6008 interface card. It was rotated from -90o to 90o. The control set consisted of interface card, motor drive and power supply. They were contained in the insulation box outside of the test room. From the experimental result, the LDR illuminance meter can measure illuminance with 4.52% average error. The light distribution curve from experiment set is correspondent with theory.