An apparatus, comprising: a fan module including a housing and a cover plate coupled to an end of the housing, the housing adapted for a fan being placed within the housing, the housing including a first end and a second end, the cover plate having a plurality of apertures; and an elongated lens having a body portion, a transition region, a neck portion, and a head portion, wherein the transition region is positioned between the body portion and the neck portion, and the neck portion is positioned between the transition region and the head portion, wherein the body portion has a first diameter and the neck portion has a second diameter that is less than the first diameter, wherein both the body portion and the neck portion are generally circular, wherein the elongated lens is configured to transmit light from the first end to the second end, the apparatus being characterized in that the head portion has a first oblong shape with a first dimension (A L) and a second dimension (B L) smaller than the first dimension (A L), wherein a first one of the plurality of apertures has a second oblong shape with a first dimension (A A) and a second dimension (B A) smaller than the first dimension, wherein the first dimension (A L) of the first oblong shape is less than the first dimension (A A) of the second oblong shape and greater than the second dimension (B A) of second oblong shape, and wherein the second dimension (B L) of the first oblong shape is less than the second dimension (B A) of second oblong shape, wherein the first dimension (A L) of the head portion is equal to the first diameter of the body portion, and the second dimension (B L) of the head portion is equal to the second diameter (B L) of the neck portion, wherein the first diameter of the body portion is greater than the second dimension of the first one of the plurality of apertures, and the second diameter of the neck portion is less than or equal to the second dimension of the first one of the plurality of apertures, wherein the first one of the plurality of apertures and the head portion are dimensioned to permit the head portion to pass through the first one of the plurality of apertures responsive to the cover plate being positioned in a first orientation relative to the head portion, and to prevent the head portion from passing through the first one of the plurality of apertures responsive to the cover plate being positioned in a second orientation relative to the head portion 38. a fan module including a housing and a cover plate coupled to an end of the housing, the housing adapted for a fan being placed within the housing, the housing including a first end and a second end, the cover plate having a plurality of apertures; and an elongated lens having a body portion, a transition region, a neck portion, and a head portion, wherein the transition region is positioned between the body portion and the neck portion, and the neck portion is positioned between the transition region and the head portion, wherein the body portion has a first diameter and the neck portion has a second diameter that is less than the first diameter, wherein both the body portion and the neck portion are generally circular, wherein the elongated lens is configured to transmit light from the first end to the second end, the apparatus being characterized in that the head portion has a first oblong shape with a first dimension (A L) and a second dimension (B L) smaller than the first dimension (A L), wherein a first one of the plurality of apertures has a second oblong shape with a first dimension (A A) and a second dimension (B A) smaller than the first dimension, wherein the first dimension (A L) of the first oblong shape is less than the first dimension (A A) of the second oblong shape and greater than the second dimension (B A) of second oblong shape, and wherein the second dimension (B L) of the first oblong shape is less than the second dimension (B A) of second oblong shape, wherein the first dimension (A L) of the head portion is equal to the first diameter of the body portion, and the second dimension (B L) of the head portion is equal to the second diameter (B L) of the neck portion, wherein the first diameter of the body portion is greater than the second dimension of the first one of the plurality of apertures, and the second diameter of the neck portion is less than or equal to the second dimension of the first one of the plurality of apertures, wherein the first one of the plurality of apertures and the head portion are dimensioned to permit the head portion to pass through the first one of the plurality of apertures responsive to the cover plate being positioned in a first orientation relative to the head portion, and to prevent the head portion from passing through the first one of the plurality of apertures responsive to the cover plate being positioned in a second orientation relative to the head portion 38.