Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the best price?
Material PE, Size Φ88x 34mm, APP Mijia APP, Battery Life Over 10 months, Color Temperature 2700k, Wireless Connection Bluetooth 4.2, Weight 150g, Rated Current 60mA, Rated Voltage 4.5V, Battery 3x AA Batteries (Not Included), Color White, Syetern Over Android 4.4 / IOS 8.0 Versions, Sensor Angle & Distance 120°, 5-7m, Rated Power 0.3w
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($31.49): BGAFF10OFF
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 502C6B, 8a26ba, e2bcea, vipupgrade8, c40d71, TTxBG10, BGss8%hl, BGPLEDNI169, BGPHMI, AFfbG10, BG25GAGA, BGPHP169, BGPIJ16, BGMFML19, 0e7f33, BGHOMEG12, FBCOUPON1, bGhOnEy10, BGHSJGYY, BGdragonBoat, BGHome15%, BGHOMEA15%
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Price history (for all/most countries) for Xiaomi Mijia Bluetooth LED PIR Smart Night Light is here.
Price records source(s): Gearbest, Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).