Patent ID: 8128838

Claim:
A marine dock post cap consisting essentially of a polymer and a phosphorescent phosphor dispersed within and throughout the polymer, wherein: the phosphorescent phosphor comprises MAl 2 O 4 wherein M is at least one cation selected from a group consisting of calcium, strontium, and barium, the phosphor comprises 0.001% to 10% of a europium activator, and the phosphor comprises 0.001% to 10% of at least one dopant selected from the group consisting of lanthanum, cerium, praseodymium, neodymium, samarium, gadolinium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, tin and bismuth as a co-activator, in terms of mol % relative to the metal element expressed by M.