Comic Discussion > QUESTIONABLE CONTENT
WCDT Strips 3146 to 3150 (1-5 February 2016)
Is it cold in here?:
--- Quote from: Martin on 04 Feb 2016, 23:59 ---Awesome Comic today ^^. One can see, that Jeph had fun to draw this
....oh and hi, i suppose....
--- End quote ---
Welcome, new person!
Morituri:
--- Quote from: Sullivan on 04 Feb 2016, 23:29 ---We're in a universe with a space station and self-aware AIs in robots... and CoD has old-style fluorescent tube ceiling fixtures? With that characteristic old fluorescent buzz, no doubt. Hardly the atmosphere for a coffee house.
--- End quote ---
It's dreadfully simple to make tubes that fit those fixtures but have a row of LEDs in them instead. You just replace the ballast with a step-down transformer you strip out of a wall-wart case.
Saves you money on your electric bills, cuts that annoying buzz and gets rid of the even-more-annoying 120Hz flicker (100Hz if you're European ) at the same time.
Kugai:
https://www.youtube.com/watch?v=4BydGYKnG6M
Sullivan:
--- Quote from: Morituri on 05 Feb 2016, 10:54 ---
--- Quote from: Sullivan on 04 Feb 2016, 23:29 ---We're in a universe with a space station and self-aware AIs in robots... and CoD has old-style fluorescent tube ceiling fixtures? With that characteristic old fluorescent buzz, no doubt. Hardly the atmosphere for a coffee house.
--- End quote ---
It's dreadfully simple to make tubes that fit those fixtures but have a row of LEDs in them instead. You just replace the ballast with a step-down transformer you strip out of a wall-wart case.
Saves you money on your electric bills, cuts that annoying buzz and gets rid of the even-more-annoying 120Hz flicker (100Hz if you're European ) at the same time.
--- End quote ---
Um, well, unless you have a very good filter on that power supply (unlikely for most wall warts) or use a SMPS (unlikely for cheap wall warts) the LEDs are still going to flicker.
And you're not going to save much. Even at the exorbitant rates I pay I'd be looking at breakeven in about 30 months; with the average rates in the US it'd be more like 90. That's not bad but it's not worth tossing out already-paid-for T12 bulbs that have a lot of years left in them.
On the other hand you have NO idea how impressed I am that you said 120 and 100 Hz instead of 60 and 50! :D
Thrudd:
--- Quote from: Morituri on 05 Feb 2016, 10:54 ---
--- Quote from: Sullivan on 04 Feb 2016, 23:29 ---We're in a universe with a space station and self-aware AIs in robots... and CoD has old-style fluorescent tube ceiling fixtures? With that characteristic old fluorescent buzz, no doubt. Hardly the atmosphere for a coffee house.
--- End quote ---
It's dreadfully simple to make tubes that fit those fixtures but have a row of LEDs in them instead. You just replace the ballast with a step-down transformer you strip out of a wall-wart case.
Saves you money on your electric bills, cuts that annoying buzz and gets rid of the even-more-annoying 120Hz flicker (100Hz if you're European ) at the same time.
--- End quote ---
I have a family member in the business though pixel boards are still his bread and butter.
LED replacements are making inroads through the industrial channel though the consumer products are mostly overpriced crap.
(click to show/hide)The cheap Chinese ones either use a step down and run on 12 volts dc or run on 120 VAC directly. Both are continuous duty and not all that efficient and the AC units may be dimable but have a short relative life span due to being over-driven and can flicker as badly as a fluorescent with a crappy ballast transformer. That 12volt transformer will be a huge power waster with hum and heat so efficiency goes to crap overall but still better than florescent.
The good ones have power regulators built into the lamp, don't need transformers, last almost as long as LEDs are theoretically supposed to last, and have a very high efficiency with a 10% duty cycle even though they do strobe at a high enough frequency to not buzz normally.
The down side is they are expensive and super bright bright bright. You are supposed to face them upwards to the reflectors so you don't blind yourself.
On the ceiling height thing in CoD, if the building is previous turn of the century then heights of 10 to 12 or even 14 feet would be pretty standard.
(click to show/hide)Although electric wiring was universal by the 1890s, incandescent lighting remained weak and inefficient… Natural light was the most important factor in setting the dimensions of a commercial space, because until the introduction of fluorescent lighting in the 1940s, sunlight was the principal source of illumination for interiors.
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Eh, I sometimes forget that norms have no clue on things like the actual hum frequencies they are exposed to.
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