I'd go for large. Do you plan on using it outside? I used the junior for about a year of cruising. The jr doesn't hold enough oil
and is real finicky in wind
over 10 knots. It also gets real hot.
If you plan for it to be strictly inside check out the Atlantic lamp. Cheaper, brighter light, and stays cooler. I actually take my Atlantic out in the cockpit
an put it in the cup holder, as long as the wind
isn't over 5 ish it does fine.
Whatever you get, make sure the replacements
are available. West marine
sold a lamp that does not have a replacement chimney, crazy, even scouring the web, buying
three ill fitting chimneys, I finally gave up.
Hope that helps. I love my oil
lamps, hope you find one you like.