General > General Technical Chat
LED LIGHTS. Any good flicker free ones?
james_s:
Personally I think LED strips are kind of boring, and most of them have poor CRI.
Psi:
You can go the ultra high CRI LED strip if you want. But they are really expensive compared to non high CRI strips.
YUJI LEDs does them, but you're looking at like $80-140 for 5 meters of 95+CRI 16.8W/m 1200lm/m
https://store.yujiintl.com/products/cri-max-cri-95-dim-to-warm-led-flexible-strip-1800k-3000k-human-centric-lighting
https://store.yujiintl.com/collections/high-cri-white-led-strips/products/cri-max-cri-95-high-efficacy-high-brightness-led-flexible-strip-5600k
It's not really that expensive when you consider it should last 20+ years, especially if you ensure the LED junction temps are under 50C.
With LED strips the heat is not concentrated all in one spot like with a normal LED lamp, so strips last effectively forever if used correctly.
themadhippy:
--- Quote ---There are two types of LED retrofit tubes on the market. One type is meant to work with the original ballast in place, and the other type you bypass the ballast and wire it straight to the line.
--- End quote ---
and the type were you need to replace or bypass the starter
james_s:
--- Quote from: themadhippy on January 22, 2023, 12:40:47 am ---and the type were you need to replace or bypass the starter
--- End quote ---
I wonder why? Starters have not been a thing here for lamps larger than 18" for around half a century when rapid start autotransformer ballasts took over, but when a starter is used it is wired between one of the pins on one end of the lamp and one of the pins on the other end with power going to the remaining pins through a choke. I can't think of a reason off hand that simply removing the starter would not be sufficient.
IanB:
--- Quote from: Psi on January 22, 2023, 12:34:23 am ---Once you go LED strip you never go back.
--- End quote ---
I might be forced to go that way eventually, but the fluorescents I have in my garage produce a claimed 5200 lumens per fixture (2600 lumens per tube), and a fixture draws 54 W, giving about 96 lumens per watt. This lm/W figure seems comparable with typical LEDs and the illumination is very comfortable on the eyes. It doesn't have any of that harsh, green, industrial feel that many fluorescents have.
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