Circadian Optics on Shark Tank

Circadian Optics makes light therapy lamps that mimic bright daylight. They are aimed at people who want more light exposure during darker months or long indoor days to support their mood and energy.

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Official website checked Nov 1, 2026.

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⏱ Circadian Optics in 30 seconds

The ask$750K for 10%Valued at $7.5M
In the tankDeal: $750K for 20%With Lori and Mark
After the showNot confirmedNo public record either way
TodayStill in business

Circadian Optics Shark Tank deal

Asked for: $750,000 for 10%
Asking valuation: $7.5M
Result: Deal
Final deal: $750,000 for 20%
Deal valuation: $3.75M
Sharks: Lori Greiner, Mark Cuban
Founders: -
From: -
Aired: Oct 6, 2019

Asked

$7.5M

Got

$3.75M

Would you have invested in Circadian Optics?

The pitch

The founders pitched Circadian Optics in Shark Tank Season 11, Episode 2 (aired Oct 6, 2019). They asked for $750,000 in exchange for 10% equity, valuing the business at $7.5M. The entrepreneurs walked away with a deal from Lori Greiner and Mark Cuban: $750,000 for 20%. That put the final valuation at $3.75M, 50% below what they originally asked for.

What happened to Circadian Optics after Shark Tank?

Still in business Last checked November 1, 2026

Our checks

Nov 1, 2026: Product photo added from the official website.
Nov 1, 2026: Visited the official website: it is working.

As of our last check (November 2026), Circadian Optics appears to still be in business. Its official website is online.

Sources (1)

circadianoptics.com/pages/about-us

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Frequently asked questions

Did Circadian Optics get a deal on Shark Tank?

Yes. Circadian Optics got a deal with Lori Greiner and Mark Cuban for $750,000 and 20% equity.

Which Shark invested in Circadian Optics?

Lori Greiner and Mark Cuban invested in Circadian Optics on Season 11 of Shark Tank. Note that some on-air deals change or fall through during due diligence.

Is Circadian Optics still in business?

As of our last check (November 2026), Circadian Optics appears to still be in business. Its official website is online.

What season and episode was Circadian Optics on Shark Tank?

Circadian Optics appeared in Season 11, Episode 2, which first aired on October 6, 2019.

Where can I buy Circadian Optics?

You can buy Circadian Optics from its official website and often on Amazon.

What was Circadian Optics's valuation on Shark Tank?

The founders valued Circadian Optics at $7,500,000 when they entered the Tank, and the final deal valued it at $3,750,000.