Glowee: An EIC Accelerator Bet on Bacterial Light That Went Dark

Glowee wanted to light cities with living organisms instead of LEDs. The Évry start-up grew marine bacteria that glow naturally, kept them alive in tanks of salt water and nutrients, and built signs and furniture around them. In the EIC Accelerator pilot's Green Deal round of 19 May 2020 it was selected for blended finance, a grant plus EIC equity, according to the European Commission's list of selected companies. The grant, €1,731,625 towards a €2,475,000 project called Pipelight_2, paid for the step from indoor installations to a first outdoor pilot, according to CORDIS.

The pilot happened. A bioluminescent information panel was installed in Rambouillet, south-west of Paris, on 13 December 2022 and trialled until 20 May 2023, the project's final report says. The company did not survive it. The Évry commercial court later fixed 1 November 2022 as the date Glowee stopped paying its debts, opened receivership on 24 April 2023 and converted it into liquidation on 10 July 2023, according to notices in the BODACC, the French official gazette of company notices. The liquidation was closed for insufficient assets on 11 July 2025, and the company was struck off the register, societe.com shows.

A Company That No Longer Exists

Glowee SAS is closed. The French company register lists it as ceased on 11 July 2025, and the last notices on its file are the filing of the creditors' list in January 2025 and the closure judgment for "insuffisance d'actif", meaning the liquidator found too few assets to pay creditors, according to the government company search and the BODACC closure notice. Societe.com also reports a notice of 25 October 2023 on the sale of the company's operating assets for €20,400; that notice could not be found in the BODACC data, and the buyer is not named.

The liquidation came because no one offered to take the business over. On 10 July 2023 the Évry court pronounced the liquidation "faute d'offre de reprise", for lack of a takeover offer, Usine Nouvelle reported. Founder Sandra Rey wrote on LinkedIn that "cette situation financière inattendue", this unexpected financial situation, would leave a false image of a technology that "n'aurait pas encore trouvé son marché", that had supposedly not yet found its market, when the result of almost ten years of research was ready.

Why the money ran out has never been fully explained. In April 2023 the lighting trade site Light ZOOM Lumière wrote that "des financements dus n'ont pas été perçus par la société", funding owed to the company had not been received, and that Glowee was looking for a buyer. Rey told Maddyness the causes were "frustrantes" and that the problem was "davantage un sujet d'entrepreneuriat qu'un sujet technologique", more about entrepreneurship than technology. Which funding failed to arrive is not public. In a 2025 episode of the investor daphni's Épitaphe podcast, Rey discussed the company's dependence on public funding, its pivots, the receivership and the liquidation, and said she had since started over with a start-up studio.

The Technology: Light That Has to Be Fed

Bioluminescence is light made by a chemical reaction inside living cells, as in fireflies or many marine organisms. Glowee used a marine bacterium, Aliivibrio fischeri, collected off the French coast, which it improved without genetic modification, according to Interesting Engineering, citing the BBC; Usine Nouvelle also reports the strains were naturally bioluminescent rather than genetically modified. The final CORDIS report says the strain was selected "via extended screening and mutagenesis campaigns", while an archived version of the company website says "we engineer these micro-organisms". The light is soft and bluish and cannot be dimmed, so it was aimed at signage, parks and ambient lighting rather than roads, Le Petit Journal reported in January 2023.

The difference from an LED is that the light source is grown rather than manufactured. Glowee argued that this saves rare metals and electronic waste; Rey claimed, as quoted by Le Petit Journal from Les Echos, that the system used 95% less water and emitted 99% less CO2 than LEDs over their life cycle. No independent life-cycle assessment of those figures has been published. The drawback is that the bacteria must be fed, aerated and kept between 10°C and 40°C, which needs pumps and, as it turned out, heating.

What Pipelight_2 Promised, and What CORDIS Shows

The project ran from 1 December 2020 to 31 May 2023. Glowee was the sole beneficiary; the Commission's list names no partner company. Its two objectives were to make the product ready for outdoor use, with better temperature resilience, light intensity, cost and monitoring, and to prove market fit with a working pilot in Rambouillet while preparing commercial launch. The proposal set out a business plan reaching €28 million of revenue in 2028.

The final report is unusually frank. Glowee built an insulated container with a bioreactor, an automated daily cycle and remote monitoring. Its first approach, a continuous culture, "failed as our chemostat was constantly contaminated" and cultures could not stay alive more than three days, so the team switched to a daily batch process, which it says halved nutrient and water use. The four-month trial in Rambouillet, it concludes, showed bioluminescence "has a place in the city of tomorrow", but "we had to add a heating canula in the product to maintain bioluminescence performance during the winter period, implying an important energy consumption, which is not compliant with our environmental impact goal". Sensors and connectivity also proved unreliable. The results page lists a trademark, two registered designs for a light-up signage panel and a French patent application for a nutrient medium filed on 20 April 2023, four days before receivership.

1. Outdoor product: container, automation, monitoringDeliveredBuilt and installed, per the CORDIS report; monitoring disturbed by sensor faults.
2. Higher light intensityPartly15 to 22 lux per CORDIS; below the 25 needed for street lighting, per Connexion.
3. Temperature resilience without energy penaltyNot achievedWinter operation needed an electric heater, which the report calls not compliant with its goal.
4. Working pilot in RambouilletDeliveredInstalled 13 December 2022, inaugurated 20 January 2023, trial ended 20 May 2023.
5. Commercial readiness and launchNot achievedReceivership in April 2023, liquidation in July 2023; no product sales announced.
6. €28M revenue by 2028Not achievedLast filed revenue €125,078 in 2021; company struck off in 2025.

On time, then, but not to plan. The pilot ran within the project period, and the technical lessons are documented. The commercial half of the project did not happen, and the EIC money ended with the company already in receivership.

The Rambouillet Pilot

Rambouillet had worked with Glowee before the EIC award. In April 2022 Glowee tubes were lighting the waiting area of the town's vaccination centre, Interesting Engineering reported. The town invested €100,000 in the project, and Glowee said it was negotiating with 40 other cities in France, Belgium, Switzerland and Portugal, according to Connexion in September 2022. No contract with any of those cities has been reported.

The panel, called the "Rambolium", was inaugurated on 20 January 2023 as the world's first urban furniture running on bioluminescence, according to Le Petit Journal. In May 2023 the town's technical director, Nicolas Pollet, told Recolight that Rambouillet wanted "to be the full-scale lab to explore bioluminescence role in the city". By then Glowee was in receivership. What happened to the panel after the liquidation could not be verified.

The Money

Glowee was financed mostly by the crowd. In October 2020 Rey said about 800 individual investors and business angels had backed the company, alongside InnoEnergy, the EU-backed energy innovation network, according to an interview with Les Colibris français. In July 2019 it ran an equity crowdfunding campaign on Happy Capital with tickets from €500, Light ZOOM Lumière reported. The company register shows two holding vehicles managed by the crowdfunding platform WiSEED, WICAP GLOWEE (created 2016) and WICAP GLOWEE 2 (created January 2022), both now with WiSEED as liquidator, according to the government company search. Sources disagree on the total: the EIB put Glowee's capital at nearly €3 million in October 2019, and Le Petit Journal wrote in January 2023 that it had raised nearly €5 million, mainly through two crowdfunding campaigns.

The EIC equity is the open question. In June 2021 the EIB said the EIC Fund had approved blended finance "combining €1.7million grant and €2 million in equity co-investment subject to certain conditions precedent". Glowee does not appear on the EIC Fund's list of invested companies, checked across all 16 pages and 319 entries for this article. There is no public evidence the €2 million was invested, and whether this was the funding Light ZOOM said had not been received is not known.

The filed accounts show a small business losing steadily. Revenue was €82,044 in 2020 and €125,078 in 2021, against net losses of €665,121 and €510,898, according to the INPI financial ratios published on data.economie.gouv.fr and confirmed by societe.com, which also shows cash falling from €1.38 million to €633,400 over 2021. The net loss was €574,979 in 2019. No accounts for 2022 were filed; the court later dated the cessation of payments to 1 November 2022.

Headcount figures vary by source. The EIB counted 17 employees in October 2019, Rey said 10 in October 2020, Le Petit Journal reported ten in January 2023 and Light ZOOM 15 in April 2023. The founding story differs too: the register and most outlets give 2014 and Rey as founder, while Maddyness wrote that the company was founded in 2013 by three business students.

Why Europe Should Care

Glowee won its award in the EIC Accelerator's dedicated Green Deal round, and its pitch matched two EU concerns: the raw materials and waste of conventional lighting, and light pollution. The second is still a policy gap. About 99% of Europe's population lives under light-polluted skies, and light pollution is "not yet specifically regulated at the EU level", according to a 2025 policy brief from PLAN-B, a research project the EU funds with €2,373,952.50 under Horizon Europe, per CORDIS. The same brief notes that outdoor lighting is regulated mainly through energy efficiency rules.

Glowee's own trial showed the limits of the idea at this stage: a bioluminescent sign that needed electric heating in winter could not yet beat an efficient LED on the environmental grounds that justified it. With the company liquidated, the buyer of its operating assets, if any, has not been named, so it is not known whether anyone is carrying its strains or designs forward.

The Verdict

Glowee's liquidator, Sandra Rey and the EIC have not been asked for comment for this article. It is based entirely on public records, press reports and EU project data, linked throughout.