Material: ABS, LED Power: 35W, Rated Voltage: DC 24V, Size: As shown, Plug Type: EU/US/AU Plug.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. I found coupon for you. Check this out.
Link: Banggood product page
1. ($148.75): BGESJY8
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, Tabby20, 2203ActiesNL, BG1efeb0, 8Couponsde, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BgGoodie9, BGcoupon8off, BGGutscheine, BG8OFFCOUPON, TTBLACK5, BG589b2e, JanBGCoupon8, BGf625a4, BG23ALEAprD, BG081591, BGCOUPERT8, BGCAPITALOS8, BGBFDAY8, BGNEWYEAR8, BGSPRING8OFF, BGHONEYSP
(probably won’t work, but you can try them out)
Price history and price alert
Price history (for all/most countries) for 35W Indoor Plant Hydroponics Grow Light LED is here. The lowest price was: $45.99.
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)).