A little experiment with the "connect" bricks (and an healty dose of stacking). I wasn't referencing any specific example of the style (of which there are many), but I'm sure that, looking for solutions as I went, I ended up with something similar to already existing typefaces (and fontstructions).

Unfortunately, some connecting bricks don't align exactly, so I had to resort to approximate them, when possible, with more stacking, which didn't particularly help the already lacking consistency in construction.

But enough moaning, enjoy!

TUBULAR LUMINII - Rounded inline display sans
  

◇◆◇ ❒  ＣＯＮＣＥＰＴ  ￭ ￭
⇛▸⇛     Font that mimics electrical gas-discharge tubes (Neon)

◇◆◇  ❒  ＢＡＣＫ  ＳＴＯＲＹ  ￭ ￭
A larger potion of the Neon-fonts that are found on the web often have these quite strong emphasis on their decorative design aspects, and a lot of them come in elaborate looking complex styles and form. Besides the numerous optional different personalized conceptual decorative elements implemented into the design, many typefaces also regularly use more commonplace modifications such as; ▸multi-linear, incisions, patterned etc.

◇◆◇  ❒  ＴＨＩＳ  ＦＯＮＴ  ￭ ￭
Instead I went with a clean, simple basic geometric letterform, one that is essentially mono-linear at it's core. The one major key element that I have incorporated to the concept is that unmistakable in-line stroke. This was done to give it more of a convincing 'tubular'-concept as is the case with a real neon gas tube.
The other less pronounced but nonetheless fundamentally important design feature are the closed stroke-endings.  Apart from being this extra little personalized element, it also suits a technical purpose. That of which is;   "To fully preserve all 'in-lined'-negative (white) space in full isolation".    This enables somewhat easier 'end-use' access to layer atributes or compound paths in graphic design software.

◇◆◇ ❒  ＦＳ  ＴＥＣＨＮＩＣＡＬ  ￭ ￭
It's constructed mainly of connector bricks and a set of custom composite bricks, expanding FS's default connection brick set. Enabling greater viariational depth and complexity for custom shaping.

◇◆◇ ❒  ＦＳ ＭＥＴＲＩＣＳ  ￭ ￭

  ❖ ❖ Metrics  ⇒ 〔measure in ⇒square grid units〕
〘▸〙〔Glyph Metrics〕
   ￮      Brick Size Filter:         ～  ２ ： ２
   ￮      Cap-Height:               ～  ４．５ ✕ ４．５  
   ￮      Ascent / Descent:      ～  ０．５ ✕ ０．５

〘▸〙〔Font Metrics〕                ❖   ❖
   ￮      Font Size:                  ～  ７．５  
          ∗ Full Em square (incl. ⇒ symb. & punct.)

More soon..

Cheers

some alternates in the lower case.

Caps-only font, with M, N, S and U alternates on the lowercase. Also you can find an extra "c" at the "¢" glyph. (Surfing again the FS waves without curvy bricks.)

I cheated by using layers to create these twists.

A font where all charecters are made by bending, expanding, etc. a single neon tube

See more:

https://fontstruct.com/fontstructions/show/1559459/slick-strontium

https://fontstruct.com/fontstructions/show/1525277/zirconia

https://fontstruct.com/fontstructions/show/1871385/table-cut

https://fontstruct.com/fontstructions/show/1719850/gruz-1

https://fontstruct.com/fontstructions/show/1307978/gimli-minuscules-cyrillic

https://fontstruct.com/fontstructions/show/942639/ecthelion_1

https://fontstruct.com/fontstructions/show/401866/digi3d

https://fontstruct.com/fontstructions/show/863425/fs_turn_off_the_sun

https://fontstruct.com/fontstructions/show/1045652/shadows_37

Decorative font with 3 open lines that give a pseudo-volume. Extended for most European and Scandinavian languages.

This is one of the ways I've always wanted to use layering in Fontstruct. Finally, it's possible :) Just a quick font to test the new feature - a grey shadow (ligh source from left to right) that is cast on inner white space of the letters.

P.S. I won't be able to sleep today, so many ideas to test... Thank you, Rob!

See More:

https://fontstruct.com/fontstructions/show/1522434/neon-lights-3

https://fontstruct.com/fontstructions/show/1920702/db-questura

TwentiesComp entry, inspired by art deco architecture. Not sure about the V, left some variations there for comparison. Also the uppercase/lowercase grave and acute are different, would like to hear which you prefer.

Decorative, ArtDeco-ish all uppercase font for TwentiesComp. Got carried away and added Cyrillic too ;) Enjoy!

Art-deco style font developed from the letter s (which wasn't that easy to make).

Decorative experimental letters drawn around XX pattern.

Based in the astonishing calligraphic work of Farruk Aziz.

An art deco-esque font inspired by the blackboard bold or double struck typefaces often used to represent sets of numbers, such as ℤ for the integers.

See more:

https://fontstruct.com/fontstructions/show/196641/gaga_stencil

https://fontstruct.com/fontstructions/show/1501135/lazzaro-1

https://fontstruct.com/fontstructions/show/1699935/skvorec-1

https://fontstruct.com/fontstructions/show/722512/teris_4

https://fontstruct.com/fontstructions/show/559344/murus_1

https://fontstruct.com/fontstructions/show/1592394/tiles-9-3

A FutureComp entry. Emphasis on the balance between future/past with a theme of: "There is no future without a past". Counter-clockwise (inner arrow) direction is for the past while the clockwise (outside arrow) direction is for the future.

Copyright 2020 Doug Peters of Symbiotic Design, all rights reserved worldwide, including creative and artistic rights. Version 1.000 sporting over 125 proper glyphs.

Copyright 2020 Doug Peters of Symbiotic Design, all rights reserved worldwide, including creative and artistic rights. Version 1.000 sporting over 125 proper glyphs.

Shadow Nose Wide font Copyright Doug Peters 2020, and released as freeware under the Creative Commons CC0 (Public Domain Dedication) license. Version 1.003 with 102 proper glyphs. Have fun.Vote!

Shadow Nose Compressed font Copyright Doug Peters 2020, and released as freeware under the Creative Commons CC0 (Public Domain Dedication) license. Version 1.003 with 102 proper glyphs. Have fun.Vote!

Shadow Nose font Copyright Doug Peters 2020, and released as freeware under the Creative Commons CC0 (Public Domain Dedication) license. Version 1.003 with 102 proper glyphs. Have fun.Vote!

WiP/ kerning in progress

See more:

https://www.fontstruct.com/fontstructions/show/445148/fs_iie

https://www.fontstruct.com/fontstructions/show/686463/katfyred

https://www.fontstruct.com/fontstructions/show/1518588/altimas-1

a simple font - idk what to do with j: its too far, but moving it closer would clash with letters like g, q, and y.