Basically copy coupon, view price history or create e-mail price alert. Best price?
Product power: LED 6W, AMP 3W, Working voltage: AC100-240V, Color temperature: TC=6520K, Color rendering index: Ra=70.9
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
Do you need price history chart (for all/most countries) for BL08A Bluetooth Speaker LED Bulb? There we go.
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)).