... panel, the thickness is 9mmKey Specifications/Features:Crystal light box adopt ultra bright SMD LED, less aging and energy saving, longer lifespanQuality ... main products include T4/T5/LED light box, LED spotlight, LED bulb, LED tube, LED panel light ,LED downlight, LED tunnel light, LED street light, Light guide panel ... and strictly follow IEC,UL,GS,EU electrical safety standard . LED crystal Light Box