The ornamental design for a writinginstrumenthavinglight reflective surfaces, as shown and described.
FIG. 1 is a side elevational view of a writing instrument having light
reflective surfaces showing our new design, all other sides being
identical thereto;
FIG. 2 is a top plan view thereof;
FIG. 3 is a bottom plan view thereof; and,
FIG 4 is a cross-sectional view taken along lines 4--4 of FIG. 1
illustrating in cross-section, the inner and outer surfaces and spiral
shaped surface discontinuities thereon.