The structural cable to be anchored, such as a main suspension cable or a stay cable, is made of a compact bundle of parallel metallic wires. Applied to a bead of newly dispensed caulking compound sealant, the present invention lubricant will not chemically interact with, prevent the curing of, or otherwise contaminate the caulking compound sealant. The light wavelength conversion ceramic is transparent and is arranged so that the light emission wavelength band after the conversion has an all ray permeability of 40% or above.