... -30W led high bay Feature Energy saving: 60%Replacement for traditional lightLong lifespan: 50,000 HRSEnvironmetn friendlyHigh power LED, ... sink and optical diffuser, longer life than incandescent & fluorescents, and constant current design, solid state, high shock & vibration resistant, mercury-free ... ) Delivery date: 3 to 5 days for sample order, 7 to 15 days for bulk order.d) Shipping method: Courier ...