Patent ID: 8610339

Claim:
A lamp comprising: a housing having an assembling opening and an electrical connection member on two ends thereof respectively, wherein the housing further comprises an inner wall and a portion of the inner wall adjacent to the assembling opening is an air-guiding wall; a heat sink having a base plate disposed at the assembling opening of the housing, wherein the base plate has a partitioning board defining an air channel of the heat sink, wherein a first air-guiding opening is formed between the air-guiding wall and the partitioning board, and wherein a second air-guiding opening is formed between the air channel and the air-guiding wall; a cooling fan coupled with the heat sink and having an impeller; and a light-emitting module coupled with the base plate of the heat sink, wherein the partitioning board is located on a periphery of the base plate and has an outer face facing the air-guiding wall of the housing, wherein the first air-guiding opening is formed between the outer face and the air-guiding wall wherein the partitioning board is partially cut off to form an opening communicating with the air channel, wherein the second air-guiding opening is formed between the opening of the partitioning board and the air-guiding wall of the housing, wherein the cooling fan has a blocking plate aligned with the opening of the partitioning board, wherein the partitioning board further includes two side flanges on two ends thereof connecting to the opening of the partitioning board, wherein the two side flanges protrude towards the air-guiding wall of the housing, and wherein the blocking plate is located between the two side flanges.