Natural　light　is　very　important　element　in　the　quality　of　vision.Solar　light　pipes　are　effective　method　to　induce　sunlight　into　the　room　need　to　be　illuminated　especially　for　corridor,　some　places　natural　sunlight　cannot　arrive.　Solar　light　pipes　are　also　effective　ways　to　reduce　electricity　consumption　for　lighting;　it　can　transmit　sunlight　from　outdoor　to　the　room　without　generating　excessive　heat.　The　performance　of　two　top　lighting　solar　light　pipes　and　one　side　lighting　solar　light　pipe　were　investigated　at　the　same　time　under　sunny　conditions　in　winter　in　Beijing.　The　results　showed　that　side　lighting　solar　light　pipes　have　better　performance　than　that　of　top　lighting　one.　Side　lighting　light　pipe　has　better　performance　than　top　lighting　light　pipe　if　there　are　no　shelters　around　the　top　dome　under　sunny　conditions　in　winter　in　Beijing.　Solar　altitude　is　the　main　reason　to　give　an　effect　on　the　performance　of　light　pipes.　The　experimental　results　also　showed　that　top　lighting　solar　light　pipes　with　＇snow　type＇　diffuser　has　better　performance　compare　with　the　＇diamond　type＇　one.　Solar　azimuth　can　also　affect　the　illuminance　for　whole　day　to　all　solar　light　pipes.　So　if　the　sunlight　collector　can　following　with　the　sun,　this　problem　can　be　resolved,　that　is　,automatic　sun　trackers　are　needed,　but　the　cost　will　become　too　much　at　the　same　time.　Different　regions　and　different　seasons　had　to　select　different　types　of　solar　light　pipes　to　achieve　maximum　output　of　illuminance　in　the　room.　Design　of　the　solar　light　pipes　must　adjust　measures　to　local　conditions.　Solar　light　pipes　will　be　popularized　in　the　near　future　in　China　because　have　many　advantages　to　improve　energy　efficiency　in　buildings.　©　2009　SPIE.