[ucubed]

They were in fact strong, strong enough to break the class. They were vampiresque. Zombies or vampires are technically a "virus". In this case they still fed off of blood as the usual zombie vampire and had sharp teeth. They were not necessarily photosensitive, but were indeed sensitive to UV a classic vampire trait. As you can see they were still out in the day, as long as they were shadows. They were smart enough to set up the same trap that fell upon the main villain's wife/spouse/partner and they indeed did feel not like a traditional zombie. It's not like a zombie or a vampire gets shot and not die.