Those free pair of goggles are the biggest lie of the whole package. They cost ~$1 and are often not able to protect your eye. Youtuber styropyro did a roundup on this(sorry for no link)
While I don't believe the 50W of these, green is the most dangerous, as it almost always has some IR noise in it, and your goggles, even if best most likely can't protect from green and IR at the same time.