Methods, systems, and apparatus are provided for manufacturing a flash module. In some implementations, the method includes mounting at least one LED module on a top portion of a first substrate for providing light. A lens portion is mounted on a second substrate in a first region of the second substrate. The lens portion illuminates the light from the at least one LED module and the second substrate comprises the first region having a first diameter and a second region for providing a path for the illuminating light having a second diameter. The first diameter is greater than the second diameter. The second substrate is mounted on the first substrate. A substance is applied to a top portion of the second substrate from an end of the first diameter to the end of the second diameter and to a side portion of the second substrate in the second region.