PAR64 60w E39 Led Highbay Light Fin-like heat sink 3 years warranty ... saving compared with conventional street light, CFL, Incandescent light.4. Estimated lifespan: >50, 000 hours5. Pure white ... no warm-up or cold start problems7. Solve 4 difficulties for LED packaging, heat sinking, operational lifespan, ... help you to design and put into product.4 Update quotation monthly5.Protection of your sales area ...