Company lists · Data refreshed September 2026
Top 25 Energy efficient companies based in the United Kingdom
RevenueBase identified 756 energy efficient companies headquartered in the United Kingdom as of September 2026 and tracks 6,666 professional contacts across them, including 2,020 with verified work emails. London is the largest hub.
This list covers energy efficient companies headquartered in the United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest energy efficient companies based in the United Kingdom
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 444 contacts → | ||||
Partial evidence “With nearly 100 years’ experience in manufacturing and supplying efficient, high-quality and connected solutions, Thorn knows lighting, inside out.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 135 contacts → | ||||
Indirect evidence “Established in 1812, Lucy Group is an international group that makes infrastructure for a sustainable future.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 123 contacts → | ||||
Indirect evidence “Mission: We manufacture well-engineered linear lighting systems that integrate with the dynamic demands of today’s market.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 106 contacts → | ||||
Indirect evidence “ASD Lighting PLC design, develop and manufacture a comprehensive range of lighting products and lighting solutions to the highest standards, with design flair and creativity.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 96 contacts → | ||||
Indirect evidence “JCC Lighting has been a leader in the lighting market for over thirty years.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 92 contacts → | ||||
Partial evidence “EES Group, a B Corp Certified company, are at the forefront of innovation, offering the latest technologies within the renewable and sustainable energy sector providing solutions…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 87 contacts → | ||||
Indirect evidence “About us Our lighting design team in the Southeast of England has over 38 years of experience within the lighting industry, with a range of early backgrounds within product…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 72 contacts → | ||||
Indirect evidence “For over 125 years the name Holophane has enjoyed an enviable reputation throughout the world for expertise, quality and innovation in lighting.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 62 contacts → | ||||
Indirect evidence “At ValueLights our commitment is as clear today as it was the day we opened our doors back in 2009, to become the go-to people for lighting for homeowners, business owners and the…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 57 contacts → | ||||
Indirect evidence “Tala was founded in 2015 by Josh, Max and William-three friends from Edinburgh University who believed great design was the fastest way to a low-carbon world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 55 contacts → | ||||
Partial evidence “Renewable Energy Experts: For over 25 years, Ecolution have been at the forefront of renewable energy services, using our award-winning expertise, to help our clients innovate and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 54 contacts → | ||||
Partial evidence “Driving the market through innovation, EvoEnergy are the UK’s leading energy technology solutions provider, helping blue-chip clients and SME’s turn their sites into ‘sustainable…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 50 contacts → | ||||
Indirect evidence “Delmatic are leading suppliers of advanced lighting control and management systems.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 50 contacts → | ||||
Indirect evidence “KSR Lighting is a family-run, market-leading manufacturer of reliable lighting solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 50 contacts → | ||||
Indirect evidence “Crompton Lamps is one of the oldest lamp businesses in the world, founded in 1878 by the late Colonel Crompton, an entrepreneur with an interest in electricity.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 47 contacts → | ||||
Indirect evidence “Switched on street lighting Over 50 years’ experience in the design and manufacture of street lighting solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 45 contacts → | ||||
Strong evidence “Megaman is a leading global brand in high-performance, energy-efficient lighting solutions, using both LED technologies and a range of fixtures.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 43 contacts → | ||||
Indirect evidence “Lyco was established in 1995 and, by consistently exceeding customer expectations, has grown to become one of the UK's leading lighting suppliers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 41 contacts → | ||||
Indirect evidence “Established in 1970 The Mode Group specialises in electronics for lighting.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 39 contacts → | ||||
Partial evidence “SolarSense specialise in the design, installation and maintenance of solar panels, energy storage, solar carports and other renewable energy technologies.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 39 contacts → | ||||
Partial evidence “We help our customers think differently about their lighting, showing them how the right choices can combat increasing energy prices, reduce energy consumption and lower carbon…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 39 contacts → | ||||
Partial evidence “Start Solar is a renewable energy – design and installation – company that specialises in a range of renewable energy solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 37 contacts → | ||||
Indirect evidence “Founded in 1973, award winning Franklite is one of the leading innovators in high-quality decorative lighting.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 35 contacts → | ||||
Partial evidence “SunGift Solar are an award-winning renewable energy company, founded in 2005.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 35 contacts → | ||||
Indirect evidence “Powerlite Fitzgerald is an independent lighting company operating out of Keighley in the U.K.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: energy efficient companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names energy efficient companies.
- Partial evidence
- Its own public description names part of energy efficient companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name energy efficient companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 756 energy efficient companies based in the United Kingdom
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Energy efficient companies based in the United Kingdom at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured worldwide rather than for United Kingdom, so it is reported there. Company counts and contact totals on this page are exact for United Kingdom, over 756 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among energy efficient companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in the United Kingdom whose own description of what they do matches “energy efficient companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names energy efficient companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among energy efficient companies, and records with no verified work email. Companies headquartered outside United Kingdom are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 2,020 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Energy efficient companies by metro
- Energy efficient companies in London78
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names energy efficient companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many energy efficient companies are there based in the United Kingdom?
RevenueBase identified 756 energy efficient companies headquartered in the United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Thorn Lighting, headquartered in Spennymoor, tops this list with the largest team on record.
Which city has the most energy efficient companies?
London leads with 78 headquartered companies, followed by Manchester (21) and Birmingham (13).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 2,020 verified decision-maker contacts tracked across these 756 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
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