Hi it has become very apparent that when the sun is behind me or it is just very sunny day ( i know that's a rarity) the rear indicators can hardly be seen on my 500l trekker . I dont know if it being yellow does not help but whatever the reason the rear indicators are not very obvious when working, so I was wondering if any one has a solution or if any one has fitted the apparently much brighter led version of the orange 501 12 w bulb that is standard fitting?