Abstract: A lamp structure includes top case, a bottom case coupled to the top case, a lamp shade coupled to the bottom case, and an LED base board provided between the lamp shade and bottom case. The top case includes a hollow member formed on a top surface, a projecting member inside the hollow member such that a first tank is defined between the hollow member and the first projecting member, a first elastic ring inside the first projecting member, and a first latch member inserted in the first projecting member and configured to press the first elastic ring. The bottom case includes a second projecting member configured to cooperate with an interior surface of the bottom case to define a second tank, a second elastic ring inside the second projecting member, and a second latch member inserted in the second projecting member and configured to press the second elastic ring.