Just check coupons out (with price alert and history). What is 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):
Power 50W, Input Voltage AC220~240V, Luminous Angle 180°, Shell Color Black, Material Aluminum, Colour Rendering Index 90, Protection Level IP65, Operating Temperature -20~60℃, Luminous Flux 3200LM, LED Qty 50PCS, Light Color RGB
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($14.09): BG00c906
put item in your cart and apply coupon code there 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): BGLED2206, Cuponation9, BGLED07, BGOct22LED, BGLEDNOV2022
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Do you need price history chart (for all/most countries) for 50W RGB LED Floodlight 50LED IP65 AC220-240V? There we go.
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)).