Aliasing blacklight → blacklight_(disambiguation)
Link to alias

Reason:

blacklight tag (currently type character) is mix of
1) blacklight "(or often black light), also referred to as a UV-A light, ... or ultraviolet light" (Wikipedia )
2) character(s) named Blacklight.

black*light tags:
33 blacklight character
10 blacklight_(character) character
9 black_light general
1 blacklight_sparkle character

blacklight_(character) seems (from brief look) to be all of Veradaux's character Blacklight
https://www.furaffinity.net/gallery/veradaux/folder/81997/Blacklight
(some art of Blacklght shows her in alternate species form)

All tagged with black_light seems to be of blacklight aka ultraviolet_light.

Plain blacklight tag:
1) mostly of blacklight aka ultraviolet light, plus
2) post #1173492 : character seemed unnamed. Tagger may have been thinking of shadow (general tag)
3) post #1056027 : FA description says "A commission for veradaux of their Blacklight as a plump elephant." so blacklight_(character) ... unless e621 gets more characters named Blacklight. (Wikipedia lists three comic characters named Blacklight)

* * *

RELATED:
general tag uv (2 posts):
1) post #97366 (for some reason) and
2) post #31847 (with "UV Blue" bottle in image, presumably type of UV Vodka)( wikipedia Phillips_Distilling_Company "brands include UV Vodka")

general tag uv_art (one post): post #221836

EDIT: The tag alias blacklight -> blacklight_(disambiguation) (forum #279780) has been rejected by @Rainbow_Dash.

ListerTheSquirrel said:
2) post #1173492 : character seemed unnamed. Tagger may have been thinking of shadow (general tag)

Or perhaps backlight, which is aliased to backlighting.

The tag alias blacklight -> blacklight_(disambiguation) (forum #279780) has been rejected by @Rainbow_Dash.