I am not sure whether or not this is the right SE site to post this question on but I'm sure someone will inform me of my mistake soon enough if it is wrong.
Basically I am an Electronic Engineer and I am creating a circuit that has a notification LED that will flash when there is a problem with the system. The circuit is in a casing that has a 'light rod' coming out of it that allows the flashes to be seen when the device is mounted to the ceiling.
The image below is a rough sketch and some pictures of what I am talking about in case it is not quite clear.
The rod that I have mentioned is what my question is about, currently it is made of plastic and is shaped quite similarly to the picture above - I am no physicist but I assume that the reason for the top of it being shaped like a rectangular based pyramid is to refract the light so it can be more clearly seen from most angles.
From an electronics point of view I want the circuit to take as little current as possible while still allowing the LED flashes to be seen clearly so I was wondering if there was a way to 'amplify' the light from the LED using the rod to the end of the rod so the LED itself could be a bit less bright but still have good visibility at the end of the rod?
Failing that, there is a fair amount of light lost through the sides of the rod before it reaches the end, would a different coloured coating around the clear plastic help prevent this? Or maybe even having a different shaped / coloured top in order to make it clearer at the end of the rod? (I thought having a translucent white shade at the top might make it more clear but then I thought it might not be 'eye catching' unless looking directly at it)
Again I apologise if this is on the wrong SE but I remember doing prisms and light refraction in physics at college and school, hence my reasons for putting it here.