Efficiency is the comparison of the amount of light (lumens) produced by a given amount of electrical energy (watts). The more the lumens per watt the more efficient the bulb.

You can also set up timers to trick potential thieves into thinking there’s someone home. This particular bulb can only provide a soft white light. TP-Link also offers fancier ones that can change ...

Right now at Amazon, you can pick up a four-pack of A19 fitting warm white Philips Hue light bulbs for just $36.99 (was $49.99). That's less than $10 each, and one of the best deals I've ever seen ...