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All About Seiko LumiBrite

Seiko LumiBrite vs. SuperLuminova vs. Rolex Chromalight, etc, etc… there are lot’s of lume comparisons out there. Heck, KeepTheTime even created an entire series called LUME WARS! But, aside from just looking at how brightly lume glows, it’s also neat to explore the technology and innovation behind each brand.

LumiBrite (or Lumi Brite) is a very impressive type of luminescence found in Seiko divers ranging from a few hundred dollars to models reaching into the thousands. In fact, many watch geeks believe every collection is deserving of an Orange Monster, partly because of the great lume they offer.

What is Seiko LumiBrite Lume?

Lumibrite is a luminous paint that is completely harmless to human beings and natural environment, containing no noxious materials such as radioactive substance. Lumibrite is a newly-developed luminous paint that absorbs the light energy of the sunlight and lighting apparatus in a short time and stores it to emit light in the dark. For example, if exposed to a light of more than 500 lux for approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours. Please note, however, that, as Lumibrite emits the light it stores, the luminance level of the light decreases gradually over time. The duration of the emitted light may also differ slightly depending on such factors as the brightness of the place where the watch is exposed to light and the distance from the light source to the watch.

This excerpt is an official description of Lumibrite found in a Grand Seiko user manual here. Jiro Uchida, president of Seiko at the time Lumibrite was introduced summed it up in a single sentence:

“Lumibrite is a virtually permanent, non-radioactive, fluorescent coating that can light up the face of a watch, or just its hands and numbers, for up to five hours after two minutes exposure to sunlight.”

Nemoto X Seiko Patent History

Japan-based Kenzo Nemoto founded his luminous paint business back in 1941. During World War II, he supplied aircraft and submarines with lumed gauges and meters. After the war, he had the idea use this product on clocks in civilian homes. He approached Seiko and the rest is history:

“Kenzo hit on the idea of painting luminous paint on the numerals and hands of watches and clocks to allow one to tell the time even at night. Kenzo took this idea to Seiko, a corporation of watches and clocks, and asked Seiko to “let him paint luminous paint on the dial plates of clocks.” After receiving the dial plates of clocks from Seiko, Kenzo would paint luminous paint on dial plates in a small workshop next to his house. Kenzo started work by delivering clocks painted with luminous paint to Seiko.” –Nemoto & Co.

Nemoto & Co. holds the patent for the original phosphorescent pigment LumiNova which was invented by them in 1993. Lumi-Brite or LumiBrite is essentially a Seiko-made and distributed product of LumiNova, while “Super-LumiNova” is the Swiss-licensed version of the same technology.

Interestingly, this article from October 31, 1994 mentions that an exclusive deal between Nemoto and Seiko was initially for a limited amount of time:

“Lumibrite is a patent of Japanese manufacturer Nemoto. Seiko holds the exclusive rights to market watches using the material until March.”

When Did Seiko Officially Introduce LumiBrite Lume?

We were unable to find an exact launch date for when Seiko began using LumiBrite, but we know it was used as far back as 1994. This article from October 31, 1994 talks about the roll-out of LumiBrite advertising and features quotes from top Seiko executives.

“Jeff Ferguson, Seiko advertising and sales administration manager, says although the target group for the Lumibrite line is consumers aged 15 to 30, there has been a strong response from other market sectors such as seniors and night-duty nurses.”

Since Lumibrite was introduced around the same time as Timex IndiGlo watches, it’s interesting to note that Seiko’s marketing campaigns were hitting hard with ads claiming “that watches featuring Lumibrite ‘glow 10 times brighter than ever before with no buttons to push.”

Watch Lume Banner

How Long Does Seiko Lume Glow?

If your Seiko watch features LumiBrite lume (which it’s very likely that it does) then according to Seiko, your watch may glow up to 3-5 hours (as stated below). Of course this depends on how well you charge it and how much luminous material was applied to the hands and markers. Please leave a comment below about how much glow time you see from your Seiko watches, be sure to include the model.

LumiBrite Features:

1. Longer output duration

  • It glows at its full brightness after a brief exposure to sunlight or artificial light (more than 500lux) for about 10 minutes. The light lasts for about 3-5 hours in the dark, which is more than 10 times longer than conventional luminous paint.

2. Stronger glow intensity

  • The intensity of glow in the dark after storing light energy is much brighter than that of conventional fluorescent luminous paint and radioactive luminous paint.

3. Safe for people and environment

  • It is completely free of radioactive substances, ensuring safety for both people and the environment. Furthermore, since there is no legal restriction on use, it is possible to cover even the entire dial.

4. Semi-permanent longevity

  • Because it is made of inorganic material, LumiBrite quality is sustained for a long period, allowing it to be used semipermanently.

(Source: Seiko FAQ here)
Reference data on the luminance

What is the Official Spelling?

Is it LumiBrite, Lumi Brite, Lumibrite, or Lumibright? In official documentation, Seiko usually refers to their luminous compound as LumiBrite. However, the spelling is inconsistent. They even have a page on their website titled Lumi Brite with a space. This could just be an SEO tactic, since this search term is also competing heavily with the teeth whitening product of the same name. Both spellings get the message across, but if you want to be as accurate as possible we recommend using LumiBrite, all one word with a capital L and B.

Interestingly enough, Super-LumiNova is also often misspelled!

Seiko Lumi Bright Lumibrite LumibrightThe images below are still pics of the two watches featured in the video above:

Read More:

We hope this information was interesting and useful to you. Please consider buying your next watch from our shop.

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Hatchett
Hatchett
5 years ago

Awesome stuff right there. Love my Monster’s lum.

Rcrrich
Rcrrich
5 years ago

Thanks for this post! Seiko lume def stands tall among Rolex, Omega, or Breitling!

Mark
Mark
3 years ago

Great informative thanks.

Richard
Richard
3 years ago

Do you know how long Seiko has been using Lumibrite? Do they have it in all their new watches? Considering buying new vs vintage and interested to know when they started using it. Thanks!

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[…] Dark blue matte finish with Lumibrite lume on the hands and markers (KTT Tip: the 009 on the reference number indicates blue while SKX007 is […]

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[…] they incorporate Seiko’s LumiBrite technology to illuminate the dials when it is dark. This non-toxic luminous paint is eco-friendly, […]

Richard Bitonti
Richard Bitonti
1 year ago

My skx009 does not iluminate in the dark. Can i order luminite ?

Saad Khan
Saad Khan
2 years ago

A pure beauty! The lumibrite feature is definitely worth praising. The golden tuna looks much better than baby tuna. Baby tuna looks so stuffed and the dial looks smaller. Would love to add golden tuna to my collection, but a big expensive though! If got a chance, i will try to share about this watch at.

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[…] to 200m and credited with ISO 6425 certification. Furthermore, Seiko’s environmentally friendly LumiBrite technology illuminates the dials when it is dark. Ultimately, this means it can handle recreational […]

Luong Gia
Luong Gia
1 year ago

Its design is like the Rolex Sub model, if you look at the shell and do not pay attention to the brand

Lewis
Lewis
1 year ago

i would like to see seiko lume up against superluminova or rolex lume. i only have a seiko at the moment so i have no way of camparing on my own.

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[…] Seiko might exaggerated a little bit when they said that their LumiBrite technology is 10 times better than radioactive luminous & conventional fluorescent paints, we have to […]

Theo Waters
Theo Waters
1 year ago

“The light lasts for about 3-5 hours in the dark” but my Seiko lume lasts about 3-5 minutes. Anyone else?

Thomas Genz
Thomas Genz
10 months ago

I have a Seiko Kinetic Sports 50 with a LumiBrite face (not hands) and I absolutely love it but unfortunately it no longer works…. would love to get it rebuilt or replace it with a new Day Date with lumibrite face .. but cannot find any on todays market

Mark
Mark
10 months ago
Reply to  Thomas Genz

Is that the two tone one? What no longer works, the watch or the lume?

Bob C
Bob C
4 months ago

Love the Lumibrite. I am older and NEED a watch with something like this over a plain jane LED light on the dial.. What is the most affordable Seiko watch with the Lumibrite?

Mian Tou
Mian Tou
4 months ago
Reply to  Bob C

I thought anything Seiko and with lume has LumiBrite. So anything really, even Seiko 5. I think were you will see less result is that the cheaper models don’t have as many layers of lume so they won’t glow as bright. Just my 2 cents.

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