Aliexpress
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. One coupon is available. Cool!
Link: Banggood product page
Coupon (17.99 USD): 10%ForBGBW
(CouponsFromChina.com tip: apply it 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): BGBWLT26, BGBWLT2615, BGBWLT2626, BGLT2613, BGHUD14113, BGTY2K, 0e7f33, BG2687N, FBCOUPON1, BGBW152, BGLT26QH, BGSENZ113, bgshOOp10, BGHome15%, bGhOnEy10, BGHOMEA15%, BgcLuBofErtA10, BGBFHOME85, BGDEALA113, BGDEFO113, BGJATD113, BGJAFO113, BGFEFR113, BGFEFO113
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for BlitzWolf BW-LT26 LED Night Light Wireless Charger is here.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).