Yeelight Human Body Induction Cabinet Light 4000K (Banggood, Aliexpress: Product Net Weight 31.5g, Working Time “Normally Open: ≥5 Hours
AUTO: 2~4 Hours
(Calculated based on using the sensor toturn on the light 3 times a day)”, Rated Input 4.5V DC/0.05A, Color Temperature 4000K, lnduction Method Light Sensor + Infrared Human Body Sensor, Product Size 155*19*25mm/3.10*0.74*0.98in, Rated Power 0.25 W(Under TA environment / Under ratedinput voltage conditions), Standby Current 40uA (the best price with coupon)).
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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.
Link: Banggood product page
1. ($13.74): TTSUMMER8
2. ($14.04): BG00c906
this code has to be applied 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): BGXINP327, BGLIG12, BGTYOC327, BGISYL327, BGTYO327, BGTYOD327, BGGD327, BGTYOG327, BG10OFFAFF1, BGYEELIGHT21, BG2589f4, BGTYOI327, 00c906, ADMITAD2212, 2022ACTIESNL, BGLED2203, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGf94f14, BGLED2206
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Yeelight Human Body Induction Cabinet Light 4000K is here. The lowest price was: $7.99.
Price records source(s): 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)).