Product details of Adjustable Night Lighted Hip-hop Hat Luminous Baseball Cap - intl
Hat is always luminous it?
After subject to natural light , incandescent light, ultraviolet
irradiation , etc..The energy stored in the light irradiation is
stopped , fluorescence way slowly released, so at night or in the
dark t see the luminous period.
How long can luminous ?
Light absorption 5-15 minutes , 30-60 minutes or so can be luminous
Tip: The size 55cm~60cm all can wear, Please rest assured