... for light box, light source, glass, electronic ballast, power line, acrylic plate, PP hollow board, national standard hardware’s etc.2 ... Certification: Electrical parts have all kinds of certifications6.Lifetime: usually 5-7 years if the frame is not broken7.Features:1 ... , metro station, bus stops, port elevator, indoor décor, wedding photos, sign stand and any places you can imagine.9. Attention: sizes ...