I did something similar to this but was turned away from using random bulbs off of Amazon since most of them lied about their product performance (advertising peak wattage of all the LEDs and then not driving them at max power), safety certifications (fake UL and ETL markings), and in several cases I could not even find valid business licenses where the companies claimed to be incorporated. I need light for the darkness of winter but not at the expense of burning down the house.

Instead, I ended up buying a string light[0] and a box of 1600lm daylight LED bulbs[1]. Installation sucks, but once the whole thing is up, it’s nice that the light is distributed throughout the room instead of coming from a single point source. It was (at least at the time) cheaper than buying corn lights—and as a bonus, you can swap back the bulbs that come with the string light for party lighting.

[0] https://www.costco.com/feit-electric-48'-led-filament-string...

[1] https://www.costco.com/feit-electric-led-100w-replacement-br...

On the higher end, I've been pretty happy with an Eve Light Strip [1]. However that's HomeKit-only. The key option we're looking for is RGBWW (with 2 different "temperature" whites) for a wider range and more natural lighting. We've been considering various more flexible light strip arrangements, but as GP noted, the market is flooded with low-reliability options.

Luckily, we've stumbled upon Sowilo [2], which advertises powerful RGBWW LED strips with appropriate specs (with per-meter max brightness and power consumption listed), provide all the components you need for powering and driving the strips you need, and best of all provide a Hue-integrated controller! (likely from scavenging an actual Hue LED strip controller!). We've ordered a kit last week, and are eagerly anticipating testing out the ~13000lm of purported light.

[1] https://www.evehome.com/en-us/eve-light-strip [2] https://sowilodesign.com/collections/led-strips

Tangentially, we've picked up 4x GE Ultra Bright [3] at Lowes for $10 each to test out the brightness, and those have been great too.

[3] https://www.lowes.com/pd/GE-Ultra-Bright-150-Watt-EQ-A23-Sof...

I actually purchased the 35,000 lumen corn bulb mentioned in the post you linked to. It's actually really big and awkward to place and has kind of a loud fan. Currently I have it propped in a corner since it's too heavy to be held by anything that I have to support it. But it will light up a bedroom just as much as a window of sun will. It doesn't look entirely like sunlight, but for the price, it does an adequate job.

So I'm a little bit confused, the linked 250W corn bulb does indeed claim 35,000 lumens: https://www.amazon.com/gp/product/B07W5DGBJZ/ref=as_li_ss_tl

But when I look at similar 250W corn bulbs on the Home Depot site they only claim 7,384 lumens: https://www.homedepot.com/p/Halco-Lighting-Technologies-250-...

How is that Amazon bulb producing 5X the lumens?

EDIT: To answer my own question, it's because the Amazon bulb actually uses 250W while the Home Depot product listings are "250W equivalent" and only use ~50W. Hence the 5X difference in light output.

Seconding this, although I only bought one giant 14k lumen corn cob, since I didn't have a good spot to put the second. Anecdotally, they've been great at staving off my usual post-lunch slump. Right around the same time as I got it, though, I started waking up much earlier naturally, without an alarm clock (shifting from ~9AM natural wake up to more like ~6AM). I'm careful about turning the corncob off no later than 6PM, and the earlier wake up time might be unrelated, but I was wondering if others had experienced a similar phenomenon with extended, consistent exposure to super bright lights during the day.

Sounds very interesting - i am currently in Europe and can see that the price is about 350 usd, and you can get versions from 3000 (warm) to 6400 kelvin (sunlight?).

What kelvin did you choose, and how large is your room? Did you put something in front of the lamp to diffuse?

Looking forward to get out of the lockdown slump! :)

My diy lamp shade has been wrapping parchment paper around the LED corn bulb (making sure to leave space for airflow so it doesn't overheat!). It's not perfect but it helps diffuse the light and make it less intense to look at.

The one I got is 5k kelvin, which was advertised as sunlight as well, and is about as cold as I can take. If I had to buy it again I probably would get something slightly warmer, tbh. I've got a lampshade on it that diffuses the light at the cost of attenuating it a bunch, but it hasn't lessened the effectiveness as far as I can tell.

I was looking into this last year, but couldn't really find anything similar here in Sweden (or anywhere in the EU). I wonder if there are some regulation here banning ultra high lumen bulbs? The closest match have been on semi-sketchy sites, where they've been ≈ 300 euro for 10k lumen...

How expensive are they in the US?

Also in Sweden - there is this Danish shop :

https://www.ledproff.dk/produkter/11907-kraftige-led-paerer-...

Trustpilot doesn't raise any major red flags, but i don't know the shop, it has "e-maerket" though which is official certification.

13.5K for about 400 usd. So it it must at least be legal in EU? They also have 14.8K if you go up 1 level.

Wait a minute, they also have a swedish shop:

https://www.ledproff.se/led-ljuskallor/11907-kraftfull-led-l...

Ah, nice. I recognise the brand of the lamp from earlier research. I read this post just now https://meaningness.com/metablog/sad-light-led-lux, where he's using ≈ car lights. That got me thinking about construction lights, they are apparently much cheaper. But not sure about the Color Rendering Index. Here [1] we have 8000 for 600 sek, but not in as a nice design maybe...

[1]: https://www.kjell.com/se/produkter/el-verktyg/belysning/utom...

I also looked into this and ended up being successful when searching for photography lights and corn cob LEDs. Corn cob bulbs at 40-60 Watts each are cheap (~20USD in the UK), provide ~4K lumens each, and 2-3 are bright enough to get to daylight levels. Would highly recommend if you want to see whether it makes any difference, and/or which colors temp works best.