LED-blacklight-diffuser-filter-woods-glass-black-light December 31, 2018 1500 × 1500 Blacklight Effects Filter – Diffuser Plate for UVA LED blacklights 380nm – 405nm Blacklight LED bulb 390nm and filter diffuser Blacklight LED bulb 390nm non-diffused and unfiltered on right, with filer diffuser on left.