Background and Objectives : Efficient Illuminance, ColorTemperature (CT), Color Rendering Index (CRI) and luminance regulations are the necessary needs for designing workplaces. The aim of this study was to investigate optical components in commercial Compact Fluorescent Lamps (CFL_s).

 Methods : In this study, 48 coil compact fluorescent lamps available at Hamadan city market with some brands and cover (warm – cool) were selected. Illuminance of lamps was measured using lux meter model INS-DX-200 and luminance was measured usinG HAGNER-S2. Color chracteristics were measured using spectoradiometer model Light Spex-3 - Gretag Macbet h .

 Results: The mean CRI of studied CFL_s was 83.67% ± 6.06 and CCT of them was 4212± 1668 °K. Statistical test of the balanced illuminance and luminance in studied lamps had not significant differences between warm light and cool light color lamps(P_value> 0.05).Besides,they had significant differences between balanced Illuminance based on domestic and foreign companies (P_value< 0.01).Comparing means showed that balanced illuminance of the domestic lamps was more than foreign products.

 Conclusion: According to the study, due to variations in quantity and quality factors, consumers should pay attention to brands and valid quality certificate of CFL_s. Since the mean illuminance of the lamps in one-meter distance was about 54 Lx/10W and in 2-meter distance was 22 Lx/10W, needed precautions should be madetouse CFL_s in designing general and local electric lightings.