Retrofit GU10/JDR spot LED lamp bulb featured with rustproof sealed Quartz glass shell without lens, clear front cover, COB LED chip, 90-100lm/W real lumen efficiency, 36° spot narrow beam and flicker-free dimmable independent driver. GU10, E11, E12, E14, E26 or E27 lamp base, good for spot lighting or accent lighting in residential lighting, commercial lighting, display lighting, landscape lighting and garden lighting, for either interior or outdoor use, work stable in spaces with moist (including seaside park, coast area, island, washroom ...) (mainly installed in indoor/outdoor track light, spotlight and embedded downlights in ceiling, wardrobe or cabinet, etc.)