Sterilization module

A sterilization module comprising:

• a main body comprising an opening formed through an upper surface thereof;
• a light-transmissive member disposed inside the main body to cover the opening and transmitting light therethrough;
• an inner sealing member surrounding a side surface of the light-transmissive member and formed of an elastic material;
• a light emitting module comprising a substrate and a light emitting device mounted on an upper surface of the substrate, the light emitting module emitting light to the light-transmissive member;
• and
• an inner holder fastened to an inner side surface of the main body and holding the light emitting module inside the main body,
• wherein the inner sealing member has an upper surface held against the upper surface of the main body and a lower surface held against an upper surface of the substrate of the light emitting module, and
• the light-transmissive member is spaced apart from the substrate by a predetermined distance which allows an irradiance of light emitted to an outside of the sterilization module through the light-transmissive member to be 65% or more of an irradiance of light emitted from the light emitting device.