... designed for solar or DC lighting system, they are with long time testing and sales.Preheating, a high electronic efficiency and ... .Higher lamination, can reach 2.Greatest switch cycle stability 3.Best reliability 4.Compact and robust design 5.Easy to install ... Standards(CE) 2.RoHS compliant 3.Manufactured according to ISO9001 Long lifetime DC CFL light, 12/24V, spiral, 15W-20W ...