eMag is just a selling platform -- you can try to contact the seller directly (unfortunately, their website seems dead; I've found an email contact sklep@trzmiel.com.pl) or thru another platform; I see they're quite active at Allegro (it's a reputable platform and the key reason Ebay never got very popular in Poland). Here's a link to the first LED you mention: https://allegro.pl/oferta/aquael-led...0cm-7407286751 (hint: "Pytanie do sprzedającego" link is "Ask seller").

Just don't mention "pot shop", you need it for your aquarium only