I'm looking for 12 volt LED lamps for our boat and I can find
*nowhere* that gives any sort of indication of how bright they are.
How can I decide what to buy if I haven't a clue whether the lamp is
the equivalent of a 6 watt incandescent or a 60 watt incadescent?

I mean it's a rather fundamental thing about a light - how bright it is!

Even CFLs quote a (very optimistic!) equivalent which does at least
give you a sort of ball-park figure for their brightness.

--
Chris Green