MODEL 20-1000-0 The Vector Classic fly light (model 1000) achieves maximum fly catch while keeping the glue boards invisible so that customers can’t see the captured flies. The Vector Classic is easy to service, requires little maintenance and offers spectacular performance. The Vector Classic uses two 15-watt bulbs and measures 21.4′ x 6.5′ x 12′. Each flylight comes with a light bulb(s) and one glue board(s) already installed. Bulbs should be replaced every 6 months to be most effective. Glue boards should be changed every 30-60 days. Glue boards may need to be changed more often in high infestation areas.