They often have nothing in between nor have a CRI 95+. It's difficult to find any LED's in stores that have more white color options other than 2700k or 5000k. I've been using Waveform's products for a year now and I'm very much happy with their lights so far. The A21 bulb has a diameter of 2.76 inches (70 mm) and a length of 5.24 inches (133 mm).ĬRI, color temperature and flicker - all of the color rendering, color temperature and flicker-free metrics are identical across both the A21 and A19 bulbs. For lamp fixtures with smaller lampshades, you may find that the A21 bulbs "stick out" a bit and may be an issue if such aesthetics are of concern. The A21 utilizes ultra-efficient emitters to reach a higher luminous efficacy value, allowing us to produce twice as many lumens with only a 50% increase in power draw.ĭimensions - the A19 bulb utilizes the traditional A19 lamp size, while the A21 bulb is slightly wider and longer. As a result, the power draw for the A21 bulb is rated at 15 watts, compared to the A19 bulb which is rated at 10 watts. Power - to achieve the higher brightness level, a higher electrical power input is required. (Incandescent bulb equivalence values are not exactly double, due to the fact that incandescent bulbs improve in efficiency at higher power levels). This bulb emits two times the brightness compared to the A19 bulb. The A19 bulb emits 800 lumens, which is equivalent in brightness to a 60 watt incandescent bulb. This product is the higher-brightness version of the CENTRIC HOME™ Flicker-Free A19 10W LED Bulb. The differences are as follows:īrightness - this A21 bulb emits 1600 lumens, which is equivalent in brightness to a 100 watt incandescent bulb.