The project
Halo (reverse-pan) channel letters put the neon tube behind the letter face rather than inside it, so the glow reads as an even wash of light around each letter's silhouette rather than the letter itself lighting up — that meant every curve on this job used a comfortably generous bend radius on wider-diameter tube, since a large architectural letterform reads better as a sweeping arc than a tight, fussy curve at this scale.
The full letter set runs on a single transformer sized against the complete 30-foot footage at the tube diameter used.