A trap for catching or killing insects comprising a. a back housing; b. an insect capture or killing means; c. an insect attracting light source comprising light emitting diodes (LED's) which emit ultra violet radiation through a lens; and d i) a cover, comprising one or more openings allowing insects to enter the trap, through which insect attracting light is dispersed or ii) a fascia and one or more independent openings allowing insects to enter the trap, through which insect attracting light is dispersed the trap being characterized in that the (LED's), which emit ultra violet radiation, are: i) not orientated to direct light to either a centre of the trap from a periphery or immediately inwardly onto the insect capture means, ii) not arranged to direct light substantially perpendicularly to a normal plane (P-P) of the back housing, and iii) not arranged to direct light immediately outwardly through the cover, but iv) are mounted in front of, and directed towards, the insect capture or killing means or the back housing, each lens having a primary lens axis at an angle of between plus or minus up to 75 degrees reading from a horizontal X-X axis to a vertical Y-Y axis. a. a back housing; b. an insect capture or killing means; c. an insect attracting light source comprising light emitting diodes (LED's) which emit ultra violet radiation through a lens; and d i) a cover, comprising one or more openings allowing insects to enter the trap, through which insect attracting light is dispersed or ii) a fascia and one or more independent openings allowing insects to enter the trap, through which insect attracting light is dispersed the trap being characterized in that the (LED's), which emit ultra violet radiation, are: i) not orientated to direct light to either a centre of the trap from a periphery or immediately inwardly onto the insect capture means, ii) not arranged to direct light substantially perpendicularly to a normal plane (P-P) of the back housing, and iii) not arranged to direct light immediately outwardly through the cover, but iv) are mounted in front of, and directed towards, the insect capture or killing means or the back housing, each lens having a primary lens axis at an angle of between plus or minus up to 75 degrees reading from a horizontal X-X axis to a vertical Y-Y axis. i) a cover, comprising one or more openings allowing insects to enter the trap, through which insect attracting light is dispersed or ii) a fascia and one or more independent openings allowing insects to enter the trap, through which insect attracting light is dispersed the trap being characterized in that the (LED's), which emit ultra violet radiation, are: i) not orientated to direct light to either a centre of the trap from a periphery or immediately inwardly onto the insect capture means, ii) not arranged to direct light substantially perpendicularly to a normal plane (P-P) of the back housing, and iii) not arranged to direct light immediately outwardly through the cover, but iv) are mounted in front of, and directed towards, the insect capture or killing means or the back housing, each lens having a primary lens axis at an angle of between plus or minus up to 75 degrees reading from a horizontal X-X axis to a vertical Y-Y axis. i) not orientated to direct light to either a centre of the trap from a periphery or immediately inwardly onto the insect capture means, ii) not arranged to direct light substantially perpendicularly to a normal plane (P-P) of the back housing, and iii) not arranged to direct light immediately outwardly through the cover, but iv) are mounted in front of, and directed towards, the insect capture or killing means or the back housing, each lens having a primary lens axis at an angle of between plus or minus up to 75 degrees reading from a horizontal X-X axis to a vertical Y-Y axis.