I don't know if this works, I just know it has 660 and 880 LEDs and, $134 with shipping, seems to be the same hat that sells for over $500.
$134 at Alibaba: alibaba.com/product-detail/...
$525 at AliExpress: aliexpress.com/item/1005003...
$600 at eBay: ebay.com/itm/174813853930
There is also this hat: Kinreen 630nm 850nm 940nm red light therapy hat for Alzheimer's treatment and Parkinson for $140 alibaba.com/product-detail/...
Are they any good? I don't know. I probably will not buy one.
Review: youtu.be/Ixy9LLuocJo