The ornamental design for a ceilinglightpanel, as shown and described.
FIG. 1 is a front perspective view of a ceiling light panel shown removed from any environment for clarity;
FIG. 2 is a top view thereof;
FIG. 3 is a bottom view thereof;
FIG. 4 is a rear view thereof;
FIG. 5 is a front view thereof;
FIG. 6 is a first side view thereof;
FIG. 7 is a second side view thereof; and,
FIG. 8 is a front perspective view in an environment of use in a ceiling light.
The broken lines depict portions of the ceiling light panel that form no part of the claimed design. The additional broken lines in FIG. 8 illustrating a ceiling light and ceiling light panels may are for environmental purposes only and form no part of the claimed design.