A wavelength-converting LED can include a light-emitting section in which
an exciting element emits a blue or ultraviolet light. A fluorescent
material that has a mean particle diameter D.sub.50 ranging from 5 .mu.m
to 20 .mu.m and that can convert at least part of the light emitted from
the exciting element into light having a wavelength longer than an
exciting wavelength, can be incorporated into the LED. A dispersing agent
with a mean particle diameter D.sub.50 not less than 1/10 of the mean
particle diameter D.sub.50 of the fluorescent material is preferably
incorporated in the LED. A binder base material can be arranged to
contain the fluorescent material, the dispersing agent and a binder
therein. The sum of the weights of the fluorescent material and the
dispersing agent is preferably in the range of 20% to 60% by weight of
said binder base material to prevent the fluorescent material from
precipitating in the binder base material upon curing.