Help me find a Deep Red LED Light Bulb

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Chronovore
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Help me find a Deep Red LED Light Bulb

I’ve previously used 25W red incandescent bulbs for winding down at night. My local store stopped carrying them. I tried the LED equivalent and it was terrible. Instead of a soft, deep red; it was more of an orange. It appears to be a cool white LED inside a red plastic dome. I know there are red emitters. There is an interesting discussion of deep red in the flashlight section. So where can I find that in a standard-sized bulb?

alpg88
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look for grow lights, 660nm is what used for indoor growing
https://www.amazon.com/ABI-Booster-Flowering-Spectrum-Enhancement/dp/B07...

Vegas LED Fan
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It looks like everything I see that shows up when you search on E27 LED bulb is just what you found – a red envelope with white LEDs inside. I do see E12 candelabra base corn bulbs with red color SMD 3014 LEDs. You would need an E27 to E12 adapter (cheap and readily available). The bulb with shipping costs about $5 and the adapter is a dollar including shipping. Output is “predominately” Red: 615-620NM 3W Note that dimmable LED bulbs require LED dimmers, not the standard one used for incandescent bulbs. If you already have it on a dimmer circuit it probably will not work with the existing dimmer.

Light bulb – Ebay Item 172735400654 (just cut and paste number in the eBay search box)
Adapter – eBay Item 133073565356

It is red when lit and clear when unlit so it is a genuine red LED.

whatsthepoint
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never underestimate the power of stupid people in large groups

hank
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aha, there’s an AC version: https://www.google.com/aclk?sa=l&ai=DChcSEwj7g8KspbTqAhUmHq0GHRQ_BpsYABB…

https://www.google.com/aclk?sa=l&ai=DChcSEwj7g8KspbTqAhUmHq0GHRQ_BpsYABB…

21W Deep Red — choose your wavelength:
730nm 660nm 630nm

LED Lamp Light Bulb PAR30
E26 (US standard “Edison” thread)
E27 (European “barely close enough for US sockets” thread)

Copied from the thread on deep red light improving eyesight:
http://budgetlightforum.com/node/73349?page=1#comment-1672652

hank
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Hm.

Quote:
By a fortunate coincidence, I just recently came across a similar problem … I can vouch for this site ….

followed by a pointer to a reseller of lighting products unrelated to the deep red light discussion.

Smells like spam to me.

atobe
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So hit that “mark as spam” button.

"☚ (<‿<)☚"

jacekk
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Is this any use? Saw it on eBay. Described as Sofirn C01R Red light Keychain Flashlight Cree XPE2 660nm Deep RED LED bulb
Original CREE XPE2 Photo Red (650-670nm)

https://www.ebay.com/itm/Sofirn-C01R-Red-light-Keychain-Flashlight-Cree-...

lightdecay
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I found some inexpensive standard-size LED bulbs that might be deep red. There are 2 different bulbs for sale, not sure how they are different, but it could be that one is dimmable and the other one is not.

Seller responded to a customer question to clarify it is 660nm:
https://www.amazon.com/ask/questions/Tx1IIWCCK44VRI0

$5.99 Red LED Grow Light Bulb, CANAGROW Universal Plant Grow Lights for Indoor Plants, E26 LED Plant Growing Lamp, 360° Lighting Angle
https://www.amazon.com/dp/B08921N3DC

$9.99 LED Grow Light Bulb – Flowering Accelerator, CANAGROW Plant Grow Lights for Indoor Plants, E26 LED Filament Bulb Plant Growing Lamp, 360° Lighting Angle Red Light, Dimmable
https://www.amazon.com/dp/B07S7BDC63

SunLike
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I can do 660nm led bulb, but it will be some expensive http://sunlikelamp.com/index.php?route=product/product&path=59_64&produc...

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

lightdecay
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lightdecay wrote:
I found some inexpensive standard-size LED bulbs that might be deep red. There are 2 different bulbs for sale, not sure how they are different, but it could be that one is dimmable and the other one is not.

Seller responded to a customer question to clarify it is 660nm:
https://www.amazon.com/ask/questions/Tx1IIWCCK44VRI0

$5.99 Red LED Grow Light Bulb, CANAGROW Universal Plant Grow Lights for Indoor Plants, E26 LED Plant Growing Lamp, 360° Lighting Angle
https://www.amazon.com/dp/B08921N3DC

$9.99 LED Grow Light Bulb – Flowering Accelerator, CANAGROW Plant Grow Lights for Indoor Plants, E26 LED Filament Bulb Plant Growing Lamp, 360° Lighting Angle Red Light, Dimmable
https://www.amazon.com/dp/B07S7BDC63

I purchased both of them, and both are dimmable according to packaging. There are 2 stickers on their boxes, one of those stickers is identical and says this is a dimmable 620nm-660nm bulb. The other sticker appears to be related to their Amazon pages, and hence different.

These bulbs are not the same though. The cheaper one is orange, the more expensive one is pinkish red. Both bulbs have clear glass, the color is coming from the filament.

I compared them to my SST-20 Deep Red D4V2 flashlight. Light from the pinkish red bulb is pleasant, but it is clearly not monochromatic. It is probably phosphor-converted red. There is a hint of blue color on blue-colored objects, but it is barely visible. There doesn’t seem to be much green.

Lightbringer
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AC-powered LED lights will almost certainly have all LEDs in series and have horrible horrible 120Hz flicker, like LED Christmas lights (or Caddy taillights).

Simpler would be to just get a 25W appliance bulb and stick a red filter-cup atop it to filter the light just like the colored glass envelope. Zero “pwm” and the same broadband red light as before.

Or there’s always those warm red french-fry lights…

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

wle
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“Probably” all red LEDs are going to be the same color..

Because the LED only has one wavelength, due to solid state/quantum physics.

Is that wrong, o great experts?

At least you are not asking for a flashlight to do the job!

That would be hard if it needs incandescent…

wle

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ggf31416
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There are several common wavelengths: 620nm (orange-red), 660nm (photo red), 730nm (far red). Then there is manufacturer variance, so LEDs are sorted into bins for different efficiency and peak frequency.

wle
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ggf31416 wrote:
There are several common wavelengths: 620nm (orange-red), 660nm (photo red), 730nm (far red). Then there is manufacturer variance, so LEDs are sorted into bins for different efficiency and peak frequency.

oh!
thanks
who knew

"You never have the wind with you - it's either against you, or you're having a good day."
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puglife2
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I want a 660nm bulb too Shocked