I don't know exactly, it should be stated in the description. I'm very happy with this lamp, the light is bright and the lifespan is certainly good. So far, so good

Hello, it's brighter and the light is slightly bluish. Have a nice day!

According to the description, this is authorised. I also have these in my car. Do not think that items NOT approved for road use are being sold here.

Unfortunately, Galaxus only gives quantity discounts when it is worthwhile for them. There are only a few items that have discounts. Unfortunately not this one, otherwise it would be visible under the price. See here: Canon PGI-580XXL (PGBK, Ink)