A bulb's most important property is its base: E27, E14, E12, B22, GU10 or GU5.3. Get that wrong and the bulb simply will not go into the light fitting. Next comes light colour: 2200–3000 K gives a warm yellowish light, 4000 K a neutral one, 6000 K cool white. Forever Light products make up the bulk of the range, while Yeelight and Shelly bulbs can also be controlled from an app. Check the voltage too — MR16 bulbs run at 12 V, decorative E12 ones at just 3 V, ordinary ones at 230 V.
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A bulb's most important property is its base: E27, E14, E12, B22, GU10 or GU5.3. Get that wrong and the bulb simply will not go into the light fitting. Next comes light colour: 2200–3000 K gives a warm yellowish light, 4000 K a neutral one, 6000 K cool white. Forever Light products make up the bulk of the range, while Yeelight and Shelly bulbs can also be controlled from an app. Check the voltage too — MR16 bulbs run at 12 V, decorative E12 ones at just 3 V, ordinary ones at 230 V.