The Collaborative International Dictionary of English v.0.48:

Lantern \Lan"tern\, v. t. [imp. & p. p. Lanterned; p. pr. &
   vb. n. Lanterning.] [Cf. F. lanterner to hang at the lamp
   post, fr. lanterne. See Lantern.]
   To furnish with a lantern; as, to lantern a lighthouse.
   [1913 Webster]