Nope, they don't need any.Don't know why they even mentioned it.You still need testers for this light?
When 'Tina' was here, Mars Hydro had lots of contests and tests with their products. They got good exposure too! My first documented run with the Mars Hydro SP 6500 got first page Google hits!
I guess they'd rather spend their advertising money on Youtubers and Instagramers.