... customized, and small order is accepted.All kinds of glow in the dark signs are available, aluminium base, plastic base, steel & iron ... base, etc. They, glow in the dark place, were known as the lives' light in the 9-11 tragic accident in World Trade Center. Many people ... , and it will continuously glow for 12+hours. 3. No need of electric power, needless of maintenance glow in the dark glowing Signs ...