Ultimate LED Bulbs - Ultra High CRI - The Honorable Quest

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Joshk
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Sekonic C-800 owner here. Even the best LEDs emit practically zero red light out at 780nm where the meter’s chart ends. And a Google search says human vision drops to zero well before that. But the good new is my bill for consultation is only $3500. You saved 50% Big Smile

lightdecay
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Light outside of 350nm-750nm range is practically invisible to humans. For example, 730nm red light is 117x dimmer than 660nm red light for the same output.

Why do you want to do this?

JaredM
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Horticulture maybe?

Joshk
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It looks like the photosynthetic response and far-red horticulture stuff is within the human visible range too.

SKV89
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I just bought some Quasar Science bulbs from their clearance sale. Here are their measurements:

Quasar Science JDR light bulb 2000k 25deg 2101K 0.0026 DUV 96.9 CRI Blue light relative amplitude 0.06 79.7 R9 96.1 R12 90 Rf 94 Rg
Quasar Science JDR light bulb 3000k 25deg 3061K 0.0035 DUV 97.1 CRI Blue light relative amplitude 0.39 84.3 R9 84.8 R12 95 Rf 99 Rg
Quasar Science medium base filament 3000k 2766K 0.0003 DUV 96.8 CRI Blue light relative amplitude 0.35 80.6 R9 84.6 R12 93 Rf 99 Rg
Quasar Science medium base filament 2000k 2091K -0.0009 DUV 96.1 CRI Blue light relative amplitude 0.13 74.2 R9 90.8 R12 93 Rf 101 Rg


The JDR bulbs have positive DUV resulting in a yellowish/greenish tint. However, the lens can easily be twisted off to insert a sheet of Lee Minus Green Filter. A very easy fix. The filament bulbs are pretty much tintless, though I prefer a negative DUV which makes white appear whiter.

SKV89
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evanh wrote:
I’d like to make a web app for this list that is a searchable, filterable list and includes spectrum data/charts. Right now I’m using the X-Rite Colormunki Photo, but I’d really like to be able to chart beyond 730nm. The much more expensive Sekonic meters only go to 780nm. The only competing product I’ve found that goes beyond is an aliexpress find for $1550 called the Hopoocolor OHSP350S that covers 350-950nm, or they have an integrating sphere setup with sensors that cover 200-1100nm, model HPCS6500, for the low low price of $7k.

Any options that I’m not aware of that would allow accurate, repeatable capture beyond 350-750nm?

The Hopocolor OHSP-350UV has the widest range I’ve ever seen for hand held spectrometers. Can be had for about $2k

evanh
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SKV89 wrote:

The Hopocolor OHSP-350UV has the widest range I’ve ever seen for hand held spectrometers. Can be had for about $2k

Any experience with the brand? Looks good on paper, but I’m a bit cautious – at the very least I wouldn’t want to compromise the validity of my 350-750 data for sake of wider range.

To reply to the others mentioning the lack of visibility of the light outside of that range:

The first thing that sparked my curiosity was my effort to simulate the look and feeling of sunlight throughout a sunrise. The intensity of sunlight’s output in the 700+ range only continues to grow, and I have to imagine that this could in some way contribute to the quality of life improvements vs a white LED that drops off quickly after 680nm. As deep/far red LEDs become more common, being able to test in that range gets more appealing as well.

Also, there are both benefits and dangers as you get into the UV spectrum as well, and I think it’d be valuable to know what these products are emitting, especially for home lighting.

Just my $0.02 USD.

Joshk
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As I understand, you are searching for rogue wavelengths emitted by cheap bulbs. Unless the bulb is based on a UV emitter, you aren’t going to find any. You see, with LED technology, it’s just a single, 460nm (blue) LED emitter, dusted with a chemical cocktail that causes a conversion of blue light to a whole rainbow of other colors. Check out these readings from these 2 LED bulbs, one cool-white, and the other warm-white. The differences are just in how much blue gets converted by the coating.

To convert to anything outside of visible, would only dim the bulb. And home-lighting bulbs already operate at far lower output than the sun. To re-create that ‘feel’, you only need to buy heating lamps. A UV one and an IR one can be added to any room to give you the same warm feeling as the sun. Of course it comes with all the dangers of unseen radiation, as well as a power bill to boot.

Evgeniy
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SKV89 wrote:

I just bought some Quasar Science bulbs from their clearance sale. Here are their measurements:

Can you measure % of pulsation of these bulbs ?

Flashlights : custom (Jaxman E2L with led4power LD-4 drivers and 3xOsram CQAR.CC), custom Skillhunt H03 with Osram 3К/4К, Zebralight {H600fc IV, Sc600fc IV, H600fc III}, Jaxman E2(N219b), Convoy UV.
Previous: Zebralight {H501, H600W, H600W II, H602W}, NiteCore TIPCRI, A A01, Fenix L2D CE/CEQ5.

SunLike
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HERE IS NEW KING!
WELCOME THE NEW KING!

I just finalized last of the MASS models today Hat

With 3030 6v SunLike TRI-R (3-R) from SeoulSemiconductor:

RIRERA 11 36pcs 3030 LEDs
33$ Ø58×130mm 130grams Δ38° E27/26 e14 GU10 gu5.3/mr16 B22



RIRERA 13D 36pcs 3030 LEDs dimmable
40$ Ø76×141.5mm 205grams Δ38° E27/26 e14 B22

With SOL 2835 3.2v SunLike TRI-R (3-R) from Smart Eco Lighting co ltd:

MASS 13D 60pcs SOL 2835 LEDs dimmable
~35$ Ø75.5×151.5(149)mm 231grams Δ41° E27/26 e14 B22


MASS GX53 48pcs SOL 2835 LEDs
~25$ 111 gram





MASS 7C 19w COB SOL
The same photo with 6C
~25$ E27/26 e14 GU10 gu5.3/mr16 B22

Compare of the size 11 and 13D

Futured bedtime bulb lamp with SOL SunLike 2200k 2250k
7w (asian style body with round diffuser) & 5w (special project body with round diffuser)


About discounts for MASS models
It was the reason why I created it
I think maximum discount will be 20-25% (with 6$ international shipping for any order) and will seems like that: 5+pcs = 5% discount; 15+pcs = 10% discount; 30+pcs = 15% discount; 50+pcs = 20% discount; 100+pcs = 25%
Wholesale price will be about 50% (without shipping)

SPECTRUMs:

there is SunLike 6v 3030 smd spectrums:

SunLikePLUS:

StarLike™ (tssss, it is the secret):

BelMORDOR’s Ламповщик|Lampman
https://t.me/sunlikenews

SKV89
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I bought the Hopoocolor OHSP-350UV and played around with it for a few days. Compared with my Sekonic C-800-U, the OHSP-350UV looks and feels much more premium, boots up in 2seconds instead of 20seconds, measures many more parameters, nicer screen, much more responsive, and sensor accuracy seems comparable. They both give about the same values measuring the same sources. Only disappointment is that the OHSP-350UV does not measure TM-30. I miss the RG value, which is an important parameter that I pay attention to. Otherwise this is has the widest range I’ve seen for hand held spectrometers. It measures from UV-C all the way to infrared.

I was surprised to find out how extremely high the UV-C value is in my incandescent bathroom heat lamp. at about 12” from the lamp, the UV-C irradiance is 0.275 mw/cm2!!!! Shocked This is as high or higher than some portable germicidal lamps!

Sars-Cov2 can be deactivated w/ 2-5 mj/cm2, which means about 10-20seconds from this heat lamp!!! According to safety thresholds, at this level of UV-C irradiance, the time of exposure cannot exceed 10-30s! WTF, how the heck can Amazon be selling something this dangerous!! Angry

contactcr
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Two interesting products:

Battery and AC powered RGBWW high CRI smart BULB, flicker free dimming. Yes, all that, supposedly:
https://www.amazon.com/dp/B08F4Z65ZF/

RGBWW portable photography light:
https://www.amazon.com/dp/B07ZVP5JT3/

Joshk
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Great comparison SKV89, thanks.
I have to say, I use my C-800 way more than I ever expected. The plan was to test everything I owned, then re-sell it. But I’ve had it over a year, and I still need new readings and comparisons every few weeks. One of my new hobbies is growing Oyster mushrooms in a tote, and their light exposure affects their color, texture, and vitaminD content. So I am using the spectrometer to take readings from the best locations and simulate it with my selection of LED strip. It’s just awesome.

evanh
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SKV89 wrote:
I bought the Hopoocolor OHSP-350UV and played around with it for a few days. Compared with my Sekonic C-800-U, the OHSP-350UV looks and feels much more premium, boots up in 2seconds instead of 20seconds, measures many more parameters, nicer screen, much more responsive, and sensor accuracy seems comparable. They both give about the same values measuring the same sources. Only disappointment is that the OHSP-350UV does not measure TM-30. I miss the RG value, which is an important parameter that I pay attention to. Otherwise this is has the widest range I’ve seen for hand held spectrometers. It measures from UV-C all the way to infrared.

I was surprised to find out how extremely high the UV-C value is in my incandescent bathroom heat lamp. at about 12” from the lamp, the UV-C irradiance is 0.275 mw/cm2!!!! Shocked This is as high or higher than some portable germicidal lamps!

Sars-Cov2 can be deactivated w/ 2-5 mj/cm2, which means about 10-20seconds from this heat lamp!!! According to safety thresholds, at this level of UV-C irradiance, the time of exposure cannot exceed 10-30s! WTF, how the heck can Amazon be selling something this dangerous!! Angry

Great feedback! For the TM30, is that something you can derive from dumping the spectral data onto your computer?

maukka
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evanh wrote:
Great feedback! For the TM30, is that something you can derive from dumping the spectral data onto your computer?

Yes, Osram Color Calculator can do this among others.

contactcr
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They can probably even add it to the software they seem to be able to customize it

maukka
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It’s probably crippled on purpose. They support TM30 on some of their other meters.

lightdecay
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markanini
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What are the options for 1500 lumen and above daylight bulbs?

contactcr
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Put up a new light fixture in my office and tested some new bulbs. Ceilings are 14’ (don’t ask, I have no idea why) and it had a frosted flush mount light fixture with 2 garbage 2700K bulbs in it. Needless to say I needed WAY more light and something a little more unique for my uniquely tall office.

10 bulb Sputnik light @ 100% brightness (it’s basically outdoor level brightness on max ~800×10 diffused lumens?)

EcoSmart 60-Watt Equivalent A19 Dimmable SMART LED Light Bulb Tunable White ($4.99 per bulb, these are clearance priced I think)

Sorry in advance for international people but this is a pretty good value for people with a ZigBee hub. It’s a house brand of Home Depot (US home improvement chain). It’s tunable from “2700K” to “6500K”

Here are some measurements with the light at 30% brightness:

2700,3000,4000

4500,6500

Considering I prefer ~3000K for indoor lights I am pleased.

niktak11
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markanini wrote:
What are the options for 1500 lumen and above daylight bulbs?

Sunlike 15-16D
evanh
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contactcr wrote:
Considering I prefer ~3000K for indoor lights I am pleased.

Woah, that absolutely blows away my Hue Ambient, which are about Ra 83. Thanks for the tip, just ordered 8 to try. Love the Duv at 3000k, as that’s my go-to interior light.

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