Ukukhanya okumnyama (okanye okuhlala kumnyama), okukwabizwa ngokuba yi-UV - Isibane, isibane seWood, okanye isibane se-ultraviolet, sisibane esikhupha i-long- wave (UV - A) ukukhanya kwe-ultraviolet kunye nokukhanya okuncinci kakhulu okubonakalayo.
Olunye uhlobo lwesibane lunesixhobo sokucoca i-violet, nokuba kwibhalbhu okanye kwisihluzo seglasi esahlukileyo kwindlu yesibane, esithintela ukukhanya okubonakalayo kwaye sivumela i-UV, ukuze isibane sibe nokukhanya kwe-violet emfiliba xa sisebenza. Izibane ezimnyama ezinale filter zinegama loshishino lokukhanyisa eliquka oonobumba "BLB".Oku kumele "blacklight blue".
I-Fluorescent Tube (UV-A BLB Counterfeit), eyaziwa kakhulu njengokukhanya okumnyama, okanye ukukhanya okuluhlaza okumnyama kwe-UVA (okanye ukukhanya okuluhlaza okwesibhakabhaka), luhlobo olukhethekileyo lomthombo wokukhanya we-UVA ophuculweyo ukukhusela amehlo abasebenzisi. I-UVA isibane esimnyama esiluhlaza sisebenzisa iglasi emnyama (ZWB3 - UG11) ekwenzeni umzimba weglasi, onokuthi ucoceke ngokufanelekileyo i-UV spectrum engafunekiyo enokuba yingozi kwiliso ukuba sesichengeni ixesha elide. Sesona sizathu siphambili sokuba kutheni umthombo wokukhanya we-UVA BLB usetyenziswe koomatshini abaninzi bomgunyathi okanye usetyenziswe kubuchwephesha ngenxa yobuhlobo obuphezulu emehlweni abasebenzisi. Iyafana ne-UVA eqhelekileyo, sisibane sokukhupha imekyuri esikhupha umthombo wokukhanya kwe-ultra violet okanye ubude be-365nm. I-Ultra violet ikhutshwa kwaye ilawulwe yiglasi emnyama esetyenziselwa ukwenza umzimba wesibane ukwenza umzobo ofunekayo we-UV.UVA umthombo wokukhanya unesicelo esikhulu somda. Zisetyenziswa kwiingcali zenzululwazi kunye noomatshini bomgunyathi.UVA isibane sifumaneka kwimilo yesibane eyahlukeneyo, enokuba yi-T5, T8, PL-S kunye ne-PL-L izibane. Basebenza nge-electronic ballast kwimarike kwaye ezinye iiwattages ezincinci zinokusebenza ngemagnethi. I-Solid state mercury (i-amalgam) ingasetyenziselwa ukuphucula ukhuseleko, uzinzo kunye nokuhambelana nokusingqongileyo kwemveliso.
Isibane se-Ultra violet sikhanya kwisiseko esisezantsi-uxinzelelo lwemercury vapor discharge mechanism, ekunyanzelekileyo ukuba usebenze ngesixhobo sangaphandle, esinokubai-ballast yamagnetic okanyei-ballast ye-elektroniki. Xa amandla exhunyiwe, ukushisa okuphezulu kudalwa kwi-filament yangaphakathi ekupheleni kombhobho. Ubushushu obuphezulu bukhupha imekyuri ngaphakathi kumbhobho ukuze yenze isekethe epheleleyo ngaphakathi kwityhubhu, ethi i-ionized mercury ikhuphe i-ultra violet xa ibetha umgubo we-UV oqatywe kwityhubhu yeglasi.