Insect capture is improved by providing a glue board having an adhesive coating on its front surface and forming a pattern of insect attractant UV light on that front surface. That pattern includes areas of bright UV light generated by light-emitting diodes that generate light at different wavelengths behind and visible through the glue board by flying insects, dimmer areas of light generated by said light-emitting diodes that bounce off other portions of the device onto the glue board, and areas of shadow on the glue board where no or little light from said light-emitting diodes is present.