Go down and check coupons out. Remember to check price history if it is available. Let’s see what best price is ATM.
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):
Light source: 200 LEDs, Environment temperature: -20 – 40 degree, Power: 1200W (True 200W), Wavelength: 450 – 470nm (blue), 620 – 660 (red), Waterproof standard: IP55
Price history and price alert
Here is price history (for all/most countries) for 200W LED Plant Grow Light.
Price records source(s): Gearbest
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)).