There is a selection offluorescent green collars to fit a wide range of quiver and rod tips, providinga neat attachment system. Green is the brightest and, therefore, most effectiveof the isotope colours. Visibility is further improved by placing the lightsvertically. With normal line management, this upright position does notincrease the incidence of wrap overs or tangles. With a pair of isotopesaligned on the rod tip about 25-30cm apart, bites are much easier to read asthe lights move apart.