A photocatalyst lamp is provided. The photocatalyst lamp includes a first printed circuit board, pluralities of first light-emitting diodes and a heat sink. The first light-emitting diodes, which can emit visible light, are disposed on the first printed circuit board, and the first printed circuit board is disposed under the heat sink, which includes pluralities of cooling fins. The present invention is characterized by the fact that the photocatalyst lamp further includes a second printed circuit board, pluralities of second light-emitting diodes and photocatalyst material. The photocatalyst material is coated on the cooling fins, and the second light-emitting diodes, which can emit ultra-violet to catalyze the photocatalyst material, are disposed on the second printed circuit board. The air, therefore, is purified. In addition, the heat sink further includes a fan assembly to increase the efficiency for the photocatalyst lamp to purify the air.一種光觸媒燈具,該光觸媒燈具包括一第一電性基板、多個第一發光二極體及一散熱裝置。其中,第一發光二極體可發出可見光且其配置於第一電性基板上,且第一電性基板配置於散熱裝置下方,而散熱裝置則包括有多個散熱片,其特徵在於:該光觸媒燈具更包括一第二電性基板、多個第二發光二極體及光觸媒材料。其中,光觸媒材料是塗布於散熱片之上,第二發光二極體是配置於該第二電性基板之上,且第二發光二極體可發出紫外光而催化光觸媒材料,而達到淨化空氣之效。此外,散熱裝置更可包括一風扇模組,以提昇光觸媒燈具淨化空氣之效率。4‧‧‧光觸媒燈具10‧‧‧保護罩110‧‧‧第三孔洞20‧‧‧反射環圈組201‧‧‧外反射環圈202‧‧‧內反射環圈30‧‧‧第一電性基板310‧‧‧第二孔洞40‧‧‧第一發光二極體50‧‧‧散熱裝置501‧‧‧風扇模組502‧‧‧散熱片510‧‧‧第一孔洞60、60’、60”‧‧‧第二電性基板70、70’、70”‧‧‧第二發光二極體80‧‧‧上外殼801‧‧‧圓形中空802‧‧‧弧形開孔803‧‧‧殼體90‧‧‧功率積體電路100‧‧‧導流保護上蓋105‧‧‧圓形中空
