The London-based four-piece band premiered the promo on Daybreak on Wednesday morning (2 October) before uploading it to YouTube.
Luminites tweeted: "Ok so we couldn't wait any longer!! Here's our official video for DO SOMETHING."
Among those loving the visual was Britain's Got Talent judge Amanda Holden, who tweeted at them: "Looking and sounding fabulous!!"
Watch the video below:
Announcing their debut single earlier this year, the group said: "Everything we've done and all the success we've achieved so far has been down to us putting ourselves out there and making the most of everything that's come our way and that's why this song means so much to us.
"We are so excited to be releasing our first ever single and hope people enjoy it."
Luminites – aka JJ, Ben, Steph and Corey – wowed Amanda and fellow judges Simon Cowell, David Walliams and Alesha Dixon on this year's show.
'Do Something' is released 10 November.