Satco's 4.5-watt LED, CFL-replacement lamp features two-sided illumination. The lamp is suitable for use in vertical or horizontal applications. When turned on, the lamp is instant-on to full brightness, with no flickering. This frost finished bulb delivers 50,000 hours of natural white light.|Satco's S18404 4.5-watt LED, CFL-replacement lamp features two-sided illumination. The lamp is suitable for use in vertical or horizontal applications. When turned on, the lamp is instant-on to full brightness, with no flickering. This frost finished bulb delivers 50,000 hours of natural white light.