[Review] Vastlite Minima Bow LED

https://lemmy.world/post/43687772

[Review] Nitecore EDC07 – lightweight EDC flashlight with adjustable color temperature

https://lemmy.world/post/43219955

NanoLEDs Push the Boundaries of Display Technology

https://lemmy.ml/post/43243068

NanoLEDs Push the Boundaries of Display Technology - Lemmy

They are making LEDs less than 100nm across, for use in ultra high dpi displays. That’s way smaller than the wavelength of light that they emit!

LED lighting (350-650nm) undermines human visual performance unless supplemented by wider spectra (400-1500nm+) like daylight

https://lemmy.ml/post/42212062

LED lighting (350-650nm) undermines human visual performance unless supplemented by wider spectra (400-1500nm+) like daylight - Lemmy

Abstract: Life evolved under broad spectrum sunlight, from ultraviolet to infrared (300–2500 nm). This spectrally balanced light sculpted life’s physiology and metabolism. But modern lighting has recently become dominated by restricted spectrum light emitting diodes (350–650 nm LEDs). Absence of longer wavelengths in LEDs and their short wavelength dominance impacts physiology, undermining normal mitochondrial respiration that regulates metabolism, disease and ageing. Mitochondria are light sensitive. The 420–450 nm dominant in LEDs suppresses respiration while deep red/infrared (670–900 nm) increases respiration in aging and some diseases including in blood sugar regulation. Here we supplement LED light with broad spectrum lighting (400–1500 nm+) for 2 weeks and test colour contrast sensitivity. We show significant improvement in this metric that last for 2 months after the supplemental lighting is removed. Mitochondria communicate across the body with systemic impacts following regional light exposure. This likely involves shifting patterns of serum cytokine expression, raising the possibility of wider negative impacts of LEDs on human health particularly, in the elderly or in the clinical environment where individuals are debilitated. Changing the lighting in these environments could be a highly economic route to improved public health.

Letzte Chance: Am 01.02. findet wieder ein Workshop 'Studioporträts' im @kontrastraum.bsky.social statt. Als Model ist diesmal die liebe Jana dabei. Mehr Infos dazu gibt es hier:

https://www.martin-hirsch.com/shop/workshop/studiofotografie-01022026/

#workshop #peoplephotography #portrait #photography #flashlight #studio #flashes

Wurkkos releases new Anduril TS26, 21700 powered, USB-C, reverse charging, IPX8, 3400lm, RGB aux leds, $40 US

https://lemmy.ml/post/41623847

Wurkkos releases new Anduril TS26, 21700 powered, USB-C, reverse charging, IPX8, 3400lm, RGB aux leds, $40 US - Lemmy

Matthew Lee of Wurkkos mentioned this to me by email last week and it’s on the site now. I’m glad that Wurkkos is continuing to make Anduril lights since I thought they had given up on them. This seems to be an Anduril version of the existing non-Anduril TS26S. It has a boost driver, flashing pads, and reverse charging which is handy in larger lights like this. Supposedly runs 520 hours in 1 lumen low mode. Come to think of it, that is fairly inefficient, but it’s ok. Also says 135 hours at 15 lumens, which is much better. Claims 2 hour charge time, pretty good for a 5000mah 21700 light. That means charging at 2.5 or maybe 3 amps. Weight and dimensions are in tiny print on page 2 of the pdf manual: 122mm long, 35mm diameter, 175g including battery. It has an interesting swirl pattern machined into the battery tube and it generally looks nice. Launch date mentioned is 1/13 (tomorrow) so right now they aren’t taking orders, but maybe by the time read this they will. I don’t feel likely to order right away since I generally prefer smaller lights, and I just got the TS11 for when I want a thrower. But, this certainly fills a popular niche and it looks like a good implementation.