Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
Coupon (28.34 USD): 13f142
(CouponsFromChina.com tip: 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
Old coupons (from the oldest to the newest): AFfbG10, BGZ18003, BGBFAFF2019, BGCITYADS2019, BGBFM18, 0e7f33, BGHOMEG12, FBCOUPON1, BGAFF10OFF, bGhOnEy10, BGHome15%, BGHOMEA15%, BGCuponation10
(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 Qualitell ZS2003 USB Silicone LED Night Light is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).