A15 frosted LED light bulb. This Ultra Definition bulb brings out the true colors of your home. Equipped with a high color rendering index of 95 (CRI95), which is comparable to natural light, it allows you to enjoy quality lighting indoors. Designed for the comfort of your eyes. Meets strict criteria for EyeComfort, a standard developed to measure products against a set of key factors that can impact the comfort of your eyes. Use this bulb with most dimmers to create your desired ambience with smooth dimming to 10% of full light levels. Philips offers best in class dimming to ensure no hum and no flicker on the large majority of home dimmers.