Ditto that. Proper anchor lights can be bought new from Den Haan Rotterdam, of via Classic Marine or Daveys. You can also get really good ones off ebay. The full dioptric lens is worth having, but it also pays to have a small lamp glass on the wick - this aids burning and you get a brighter flame with less sooting. Try and avoid the repro ones- they look good on the outside but have poor tank and wick arrangements. If you really want a good one they cost about Ł100+ so try ebay first.