Luminous scutcheon is that the printing ink silk was printed by luminous printing ink, this product did not need any power, and only show, the products are as follows, by oneself at night Fire escape, evacuating the stair, emergency exit, barrier, fire-fighting equipment indicating and warning sign. Sucks the light, holds all, bright place to absorb for various kinds of visible light and 10-20 minutes by oneself, the dark place gives out light...