![]() Wireless network: You can control most smart bulbs wirelessly through smartphone apps.We looked at those features, as well as actual primary and secondary colors and each bulb’s color rendering index (CRI) rating-a measurement of how accurately each bulb can produce colors. Color: While we considered color-adjustable, tunable-white, and plain-white smart bulbs, we found color-adjustable bulbs to be the most feature-rich.We use a light meter to measure each bulb’s lux, using the same equipment, under the same conditions, at various angles and dimming levels. ![]() Lux is another standard measurement, which is superior because it describes how effectively the light spreads. Lumens are a measurement of the total potential light a bulb emits.
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