I have just checked coupons. The lowest price I could get is $45.89 for SEALIGHT X4 28000lm Pair 110W Car LED Headlight Bulbs H4 (in Banggood). Basically copy coupon, view price history or create e-mail price alert. What is best price?
SEALIGHT X4 28000LM Pair 110W Car LED Headlight Bulbs 6500K Cool White LED Light IP68 Waterproof – H4
Latest coupon and price update (UTC):
Banggood ($45.89)
Banggood warehouse is located in China. Is it cheap? Well, this price is higher than average price ($39.49) You can get coupon down below.
Link: Banggood product page
Price without coupon: $50.99
1. ($45.89): BGAMMT03
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
There were country-specific coupon codes published on Couponsfromchina social channels and price alerts. Coupon price may vary by country, because there’re different VAT rates, shipping cost etc. There is a chance that some latest coupons are still working:
1. (15.4.2024, $40.99): BGbd914c
Item: SEALIGHT X4 28000lm Pair 110W Car LED Headlight Bulbs H4
Countries: CzechRepublic, Greece, Hungary, Poland, Slovakia(SlovakRepublic)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – SEALIGHT X4 28000lm Pair 110W Car LED Headlight Bulbs H11 ($38.69)
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Price history and price alert
Check out price history chart (for all/most countries) for SEALIGHT X4 28000lm Pair 110W Car LED Headlight Bulbs H4.
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)).