Material: PLA, Battery Capacity: 400mAh, Bulb: LED, Diameter: 5.5in/13cm, Body Color: White, Charging Time: 2 hours, Power Supply: USB DC 5V, Lighting Color: White/Warm White, Working Time: 2-7 hours(Due to the Brightness you choose), Power: 2W.
Just check coupons out (with price alert and history). Do you want to know what the best price is?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
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. Only one coupon available!
Link: Banggood product page
1. ($15.75): TTxBG10
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 502C6B
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Moon Light Lamp 13cm? There we go. The lowest price was: $14.73.
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)).