Amazon currently has the eufy Lumos Smart Bulb on sale today for just $16.99. That's a great price in general for a smart light bulb, but this one is typically priced at around $24.99, so you're getting $8 off of its regular price. Definitely worth it to pick up a few bulbs right now, at this low price.
The eufy Lumos Smart Bulb is actually from Anker's sub-brand eufy, so you're getting a good product here at a low price – something that Anker has been making a name for, for quite a few years. This is the tunable white bulb from eufy, so it's not a color bulb, but it can go from regular white to a more yellowish tint, depending on how you want it to look in the lamp or light fixture you have it. The eufy Lumos Smart Bulb is controllable through the eufy app (available on both Android and iOS), so you can set timers to have them turn off at certain times. Also set schedules and much more. These light bulbs are also compatible with both Google Assistant and Amazon Alexa, so you can use your voice to control these light bulbs. That also works really well, as you can say "OK Google, turn on the desk lamp" and it'll turn it on immediately.
This item is also eligible for Amazon Prime's free shipping. Which includes free two-day shipping, and pretty cheap (usually $3.99) next-day shipping if you need it extra fast. If you are not an Amazon Prime member yet, you can sign up for a free trial of Amazon Prime. You'll get 30 days free (if you're a student, you get 6 months), and then it's $99/year (or $49/year for students). Prime members do get a whole lot more than just free shipping though, so be sure to check out the full benefits.