Go down and check coupons out. Remember to check price history if it is available. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Projection Coverage: 15 – 50㎡ (161-538 sq.ft), Color: 10 RGB Lighting Modes (Galaxy Starry), bluetooth：0-10M (MHX-TB88 Chip), Operating Temperature: 0°C – 40°C, Power input: USB 5V 2A
Banggood
Banggood warehouse is located in Europe 
. I don’t know if this is a good price – number of records in my database is too low! You can get coupon down below.
Link: Banggood product page
1. ($22.28): BG00c906
paste coupon code in your cart and click Apply 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): 2022ACTIESNL, Terence, BGLED2203, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGf94f14, BGLED2206, BG8ReviTrage, Cuponation9, BGLED07, BGccec78, BGLEDNOV2022
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Not enough data to show price history chart… $19.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).