Amazon. Buy from them not third party. Also when I ordered they said it would be 4 weeks but it came in 3 days.
I went with the cheaper option that said it would take 5 weeks to ship and it took 5 days! [https://www.amazon.com/gp/aw/d/B09PC7QZ81
I've had the black lights for a while now. I went with these - https://www.amazon.com/ZHMA-Waterproof-Supplies-Blacklight-Decorations/dp/B07MNYB3HP/ref=sr_1_1_sspa?crid=3BQBM8WJ8EP7H
and 2 of these -https://www.amazon.com/gp/product/B0787DCR5N/ref=ppx_yo_dt_b_asin_title_o01_s01?ie=UTF8&psc=1 for a 20' x 20' room