The ornamental design for a ledlighttube, as shown and described.
FIG. 1 is a black and white front elevation photograph of a triadic female socket of the new design of the lighting element of the invention. Note that the name “lightubes” is not part of the ornamental design.
FIG. 2 is a black and white back elevation photograph of a triadic male socket end of the new design of the lighting element of the invention. Note that the name “lightubes” is not part of the ornamental design; and,
FIG. 3 is a black and white side elevation photograph of the new design of the lighting element of the invention showing the entire length of the invention both said female and male socket ends mounted at each end of a tube.