Interesting, must be a different product listing or they “cleaned up” their reviews like so many products on Amazon do.
I really wanted to pick some up a few months ago but the first couple pages of reviews I saw were all negative with many pics of discolored/melted bases.
On the other hand maybe they have improved their heat sinks?
The product page looks the same as I recall it 1 year ago when I bought my first Hyperikon. They do sell bulbs in different form factors. Maybe you were looking at a different model. Perhaps with a small form factor and high power?
Thanks to Greg Yeutter (@yeutterg) for sending me a free Bedtime Bulb for testing the output fluctuation issue! I have no advanced measuring equipment with logging capabilities, so I took a video of a white wall and sped it up ten times to make any fluctuations more visible.
This video captures eight minutes of the Bedtime LED Bulb with fixed camera settings, played back at 10x speed. Included is the view at a multimeter measuring the AC mains voltage which varied between 235 V to 237 V. This is for Celle, Germany.
During the test there was no visible fluctuation of the light output and I couldn’t notice it in this sped up video.
Overall the bulb looks good, but I prefer a color temperature of around 3500 K. I’m not a follower of the anti blue light conspiracy, but love high CRI and a variation of color temperature for different moods. If you don’t mind the 2200 K of this light, the spectrum looks really nice (thanks @maukka). The output is too low for productive use, but I think this makes a really great bedside light (as intended!).
The only issue I’ve found is the sensitivity to static electricity. Just pulling off the bubble wrap was enough to light up the LED filaments! Touching and slightly rubbing the clear part of the bulb with the bubble wrap caused the light to flicker, without even touching the metal contacts.
Thanks for the test! I’ll take my bulbs to a couple different locations and check the behavior.
Looks pretty good SammysHP. There is a flicker at 13.5 seconds, but it may just be a video compression issue.
Thanks all for the feedback on future designs. We are definitely considering making general purpose bulbs with a focus on quality of light, mostly targeted at lighting designers but potentially also for sale to consumers. Probably the closest comparable today would be Soraa’s line of bulbs, but with some different design decisions. One of the people on the IES Color Committee (who are responsible for TM-30) has been begging me for this.
I also really appreciate all your help with the testing of brightness fluctuations. I hope you can understand that I’m in a bit of a vulnerable position, but this is the power of the internet, being able to test for a defect all across Europe in a matter of days. So far, Maukka is the only person to experience this, but we haven’t made a conclusion on what to do just yet. We may limit sales in regions where this is a known issue until we ship the product with a new power supply.
I just checked out Soraa’s bulb. The flashy webpage and professional marketing had me excited, until I saw the spectrum distribution and TM-30 data on the spec sheet. Bummer.
If you do start making a new lighting product, I actually think BLF might not be a bad launchpad. The feedback from some of us with spectrometers and experience will be far more insightful than the average Amazon customer that only has experience with hateful 1-star feedback that simply reads “JUNK!” or “DO NOT BUY!”.
give me results please. of SORAA.
I don’t own any Soraa, but from what I see in their datasheet, their spectrum is quite wobbly, and this is verified in their TM-30 as under-saturation and tint shift.
but they call it healthy. It is for eyes, not for colors.
Yeah, the compression is pretty bad. Tomorrow I can check the original footage and also export the mean brightness of each frame.
Ah, you clicked on “SORAA HEALTHY A19/A60”. I clicked on “SORAA VIVID A19/A60”. They don’t even have the balls to post color rendering data for that “healthy” bulb, other than to say CRI=80 R9=90. I would never buy a bulb with no blue rendering. If I want less blue light in my life, I will dim the lights.
Nothing personal just business :money_mouth_face:
You mean I won’t get 1-star reviews for being “too bright” or “too dim?”
Well if you do, there will be data to back up the claim 
When I was talking about Soraa as a comparable for building high-CRI (etc.) bulbs, I was really referring to the Vivid line.
But since Soraa Healthy is more comparable to BB, of course I have tested it. It's a cool idea and technology, but I don't agree with their approach. Especially because it ignores the "green" half of melanopic light.
Basically, they eliminate all blue light, but green is just as stimulating from a melanopic/circadian perspective. Read more here.
Bedtime Bulb still has a slightly lower melanopic input despite having blue, and with far superior color quality.
Here are the specs I have on Soraa Healthy, taken with my UPRtek CV600. I heard they may have tweaked it slightly, but even in this version, CRI is worse than advertised:
Spectrum. Note that the gray hump is the full melanopic area spanning blue and green, not just the "blue" hump that Soraa shows in their graphics:
Holy he, that’s 10 MacAdams tints from BBL/White!
And yea, CRI 74 with R12=9, eesh.
You already have a bedtime bulb, why not make this the best daytime bulb and not worry about melanin suppression?
Not sure I understand the question.
BB is a special-purpose product focused on a consumer sales channel. High-CRI general-purpose lighting will mostly sell in the B2B sales channel. Not saying consumers won’t buy it, but it’s much less differentiated from a consumer marketing perspective.
I guess I just don’t see a use case for a 3500K bulb with no blue or green color rendering.
If you made a high CRI 3500K bulb, that would be differentiated, but it wouldn’t take much investment for the other high CRI players in the market to adjust their spectrum to 3500K. I can’t really recommend putting in the effort if that’s the case.
Oh I see. To be clear, we intend to only make the Bedtime Bulb products in a low CCT, as that is part of what most people find pleasing at night.
The general purpose bulbs wouldn’t have melanopic reduction most likely. Although we may consider some of the new “flat” SPDs (in the style of Seoul SunLike).