COSTCO - FEIT Electric Led String Lights 48 ft. Color Changing (item 689116) $39.99 (YMMV)
Local Costco has these lights on sale. For $39.99 after instant rebate of $30. Bright white and multi-colored. Seems to go on sale regularly. Trying to post pic. from store but cannot do on mobile app.
Sorry, some updates, this is now obviously a YMMV based on local Costco. Below is the link to the product on Costco's site: