Just check coupons out (with price alert and history). Do you want to know what the best price is?
Power input: 100-240V-50/60Hz, Rated power: 5.1W (2m) 21W (10m), Product model: YLDD005, Wireless connection: Wi-Fi EEE 802.11b/g/n 2.4GHz, Compatible: Android 4.4 & ios 10.0 or above, Standard bag (2m), Power factor: 0.5
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):
Banggood
Banggood warehouse is located in China. CouponsFromChina software could not find any coupon for this product in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 00c906, BG00c906, ADMITAD2212, BG0b3891, 2022ACTIESNL, BGAlerabat1, BG053f32, Terence, BGLED2203, BGd2a899, BG62a551, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGf94f14, BGLED2206, BGM6B58, Cuponation9, BGa334c8, BGLED07, BG786f35, BGa0a51b, BG4797e5, BG8ReviTrage, BG4f0543, BGYEE2022, BGLEDNOV2022, TTBLACK5, BG589b2e
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Yeelight 2m YLDD005 Smart LED Light Strip Pro [EU] ($49.99)
Price history and price alert
Do you need price history chart (for all/most countries) for Yeelight 2m YLDD005 Smart LED Light Strip Pro? 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)).