if an led or laser source 20 fails a technician merely needs to replace the failed semiconductor optical device within equipment shelter 22 fig2 illustrates in slightly more detail an exemplary ground level light source system that may be used with a tower in accordance with the teachings of the present invention in this case ground level light source 20 includes an led light emitter 50 that is powered in a conventional well known fashion not shown to emit an optical signal at a predetermined power level it is to be understood that a laser transmitter or any other suitable semiconductor optical device can be used as the light source in the arrangement of the present invention the optical signal output from led 50 is then coupled into fiber optic input cable 24 and applied as an input to splice box 26 which in this case comprises a 1 u00d7 2 optical coupler in its most general form the splice box may include a 1 u00d7 n optical coupler for splitting the signal optical input signal into a plurality of n separate optical signals that are then coupled into a plurality of n optical fibers disposed upward along tower 12 referring back to fig2 splice box 26 as shown functions to split the light signal propagating along cable 24 into a pair of signals of equal power coupling the first signal into fiber cable 28 and the second signal into fiber cable 30 lens systems 36 and 38 comprise conventional lensing used for tower applications such as fresnel lenses that allow for the associated beam to be magnified and disbursed in the 360.