Solar light pipes are effective ways of transmitting sun light into the rooms which are short of daylight and saving electrical lighting consumption in daylight. But solar light pipes can bring heat into the room at the same time. The temperature effect of side lighting solar light pipe and top lighting solar light pipes were tested in this paper. The length of side lighting solar light pipe was 2.6m with the diameter 0.36m. The length of top lighting solar light pipes were 1.3m with the diameter 0.36m.The temperature of air was tested by RH-LOG auto thermoscope. The temperature of the diffuser surface of top lighting solar light pipes was measured by NEC TH5104 Thermal Infrared Imager. The experimental results showed that solar light pipes can not only bring light into otherwise inaccessible or dimly lit places, but also improve the internal environment without generating excessive heat. So solar light pipes are appropriate methods for daylighting.

ABSTRACT
 1. INTRODUCTION
 2. EXPERIMENTAL APPRATUS
 3. THE EFFECTS OF SIDE LIGHTING SOLAR LIGHT PIPE ON ROOM TEMPERATURE
 4. THE EFFECTS OF TOP LIGHTING SOLAR LIGHT PIPES ON ROOM TEMPERATURE
 5. CONCLUSIONS
 6. REFERENCES

• Wu Yanpeng(Department of Built Environment and Services Engineering, School of Civil and Environmental Engineering, University of Science and Technology Beijing)
• Ma Chongfang(Beijing University of Technology College of Environmental and Energy Engineering, Beijing University of Technology)