I pit a true day maker on my standard and it is the 7" that fits the adapter.
$99 free shipping from Scoot lights. Some other vendors sell the same light for 3x as much. Don't know what quality or anything else of the bulb you bought but don't think it will work with the adapter at all.
You bid and won so I would pay for it and find another use for it.
That's what I'll do. Can put it on a 3 wheeler at the farm as it comes with a bucket. I don't want anything negative of my eBay record.
Thanks for the Scoots rec. I've been looking at the lights for a while & prices are all over the board.
Thanks.