iGlow

Just like Voltage, iGlow does not rely on UV, neon or black lights to create glow. Instead, it produces its own light!
Tiny, microscopic particles in the gel come together in the mixing process to produce a bright colorful glow that can be
seen in partial light and in the dark for several hours.

While iGlow is classified as a “temporary hair color” it does not actually color the hair cuticle. It “coats” the hair
with color. The gel is the delivery medium for the luminescence (glow).

(via popgadget)