Iftiinka Bollard, oo sidoo kale loo yaqaan iftiinka dambe, iftiinka beerta, waa nooc ka mid ah iftiinka taagan hareeraha waddada ama cawska. Haddii aad dooranayso nalalka LED-ka ee dibadda ama nalalka qorraxda , iftiinka dibadda ee aan biyuhu lahayn ee dayactirka hooseeya iyo qiimaha hooseeya waa inuu noqdaa doorashadaada koowaad. oo ay ku jiraan LED beerta iftiinka boostada, iftiinka beerta bannaanka leh qaab caan ah iyo qiimaha warshadda.