Journal profile · Optics
Leukos
ISSN 1550-2724 · eISSN 1550-2716 · Taylor and Francis Ltd. · UNITED STATES · Quarterly
Leukos: CAS Zone 3 · Engineering (2025 upgraded edition); impact factor 1.71; hybrid open access; APC about USD 3,250; median 244 days to acceptance (73 articles, last 24 months); community-reported acceptance: easy; 35 articles in 2025; indexed in SCIE and Scopus.
Scope
Aims, scope and focus
Leukos is published by Taylor and Francis Ltd. and is in Zone 3 of Engineering in the CAS Journal Ranking (2025 upgraded edition). By OpenAlex counts of its recent articles, its largest topics are Impact of Light on Environment and Health, Building Energy and Comfort Optimization and Color Science and Applications, together about 48.3% of its articles. (generated from OpenAlex topic counts and CAS ranking data)
Leukos , the journal of the Illuminating Engineering Society (IES), is a subscription-based peer-reviewed journal covering technical developments, scientific discoveries, and experimental results of current interest or lasting importance in the applied use of light. Topics of interest include visual and non-visual responses to optical radiation, all aspects of the technologies employed in the generation, control, measurement, and computation of light and color, the lighting design of interior and exterior environments, and crosscutting topics that include daylighting, energy management, economics, and sustainability. The journal welcomes for consideration the following types of manuscripts, and all articles received by the Journal will be subject to double anonymous peer review: Scientific research results. Research results of significant and archival value in those scientific disciplines directly or indirectly related to light. Engineering developments. Reports on new or improved equipment, materials, processes, or systems used directly or indirectly in lighting, lighting equipment, or lighting design. Technical aspects of lighting applications. Technical aspects related to electric lighting, daylighting, lighting controls, standards and innovations in design. Tutorial articles or critical reviews. Summaries of a technical topic in lighting of general interest, written specifically for study and instructional purposes. Tutorials and reviews are meant for technically knowledgeable readers who are not specialists in the subjects treated. Brief communications. These are notes or short articles, of a technical nature that do not have the scope or extensive results of large studies or engineering projects, but provide useful data, analyses, or information. Data notes. Short peer-reviewed articles that concisely describe the author’s research data stored in a repository. Authors can choose to publish gold open access in this journal. Read the Instructions for Authors for information on how to submit your article.
From the journal's Aims & Scope
Research area (LetPub): Optics
Editorial board by country: none in mainland China; most named United States 2, Hong Kong, China 1, Canada 1, Netherlands 1, Switzerland 1 (7 members with a country) Editorial board ↗Publisher website ·
Main research topics OpenAlex counts of recent articles; shares are approximate
- Impact of Light on Environment and HealthEnvironmental Science22.4%
- Building Energy and Comfort OptimizationEngineering13.5%
- Color Science and ApplicationsPhysics and Astronomy12.4%
- Color perception and designPsychology11.3%
- Visual perception and processing mechanismsNeuroscience7.4%
- Urban Green Space and HealthEnvironmental Science4.6%
- Circadian rhythm and melatoninNeuroscience3.9%
- Urban Heat Island MitigationEnvironmental Science3.8%
Rankings & indexing
CAS ranking and database indexing
CAS Journal Ranking
CAS Journal Ranking, upgraded edition (March 2025)Engineering Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 3 |
| Minor | Construction & Building Technology | Zone 3 |
| Minor | Optics | Zone 3 |
Top journal: noReview journal: no
CAS Xinrui Journal Ranking (March 2026)Engineering Zone 3
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 3 |
| Minor | Construction & Building Technology | Zone 3 |
| Minor | Optics | Zone 3 |
Top journal: noReview journal: not marked
CAS Journal Ranking, previous upgraded edition (December 2023)Engineering Zone 2
| Level | Category | Zone |
|---|---|---|
| Major | Engineering | Zone 2 |
| Minor | Construction & Building Technology | Zone 3 |
| Minor | Optics | Zone 3 |
Top journal: noReview journal: no
JCR / CiteScore quartiles on the journal's website
- CiteScore Q1 · 2025
Publisher-reported: JCR figures are Clarivate's and CiteScore figures Scopus's to confirm; both are a different system from the CAS zones.Publisher website
Database indexing
SCIEScopusLetPub
International journal early-warning lists: not listed in any editionLetPub
Editions, and major and minor categories, are shown separately and never merged into one zone; check which edition your institution uses before you submit or report.
Metrics
Impact metrics and publication volume
Impact
- Impact factor
- 1.71LetPub ·
- Impact factor (publisher) 2025
- 1.7Publisher website ·
- 5-year impact factor (publisher) 2025
- 3.2Publisher website ·
- CiteScore 2026-06
- 7.1LetPub ·
- CiteScore (publisher) 2025
- 7.1Publisher website ·
- SJR 2026-06
- 0.77LetPub ·
- SJR (publisher) 2025
- 0.77Publisher website ·
- SNIP 2026-06
- 1.73LetPub ·
- SNIP (publisher) 2025
- 1.73Publisher website ·
- h-index
- 21LetPub ·
- h-index
- 46OpenAlex ·
- i10-index
- 231OpenAlex ·
- 2-year mean citedness
- 1.95OpenAlex ·
- Self-citation rate
- 11.8%LetPub ·
- Share of gold OA articles
- 16.67%LetPub ·
Volume
- Articles per year
- 35LetPub ·
- Downloads per year (publisher)
- 85,000Publisher website ·
Articles by year OpenAlex count · 597 in total · the current year is incomplete
| Year | Articles | Open access | Citations |
|---|---|---|---|
| 2026 | 32 | 7 | 10 |
| 2025 | 35 | 15 | 62 |
| 2024 | 32 | 12 | 121 |
| 2023 | 17 | 8 | 154 |
| 2022 | 27 | 13 | 350 |
| 2021 | 26 | 12 | 631 |
Sources count differently and were observed at different times, so each source's own value is kept; "publisher" marks figures from the journal's website.
Review & acceptance
Review time and acceptance
Review time from article dates manuscript dates registered with Crossref · to
244 daysMedian, submission to acceptance · P25–P75 173 days – 398 days
- Acceptance to online
- median 40 days (73 articles)
- Submission to online
- median 306 days
- Sample
- 73 articles with submission and acceptance dates (76 in the window); the latest was accepted on
Only articles that were accepted and published are counted, not the time spent on rejected manuscripts, so this usually runs longer than a publisher's "time to first decision".
Other sources
- Average review time (community reports)
- over 12 weeksLetPub ·
- Average acceptance (community reports)
- EasyLetPub ·
- Acceptance rate (publisher)
- 36%Publisher website ·
- Submission to first decision
- 50 daysPublisher website ·
- First decision after review
- 89 daysPublisher website ·
- Acceptance to publication
- 42 daysPublisher website ·
- Peer review
- Double anonymous peer reviewPublisher website
Community reports come from authors' own submissions (confidence 0.5) and are not a promise from the journal; for publisher figures, the journal's own definitions apply.
Fees & open access
APC and open-access policy
Hybrid open accessLetPub
A subscription journal in which authors can pay to publish their article open access.
| Source | APC | Fee waiver | License | Observed |
|---|---|---|---|---|
| Publisher website | USD 3,250 | — | — |
A hybrid journal charges the APC only when the author chooses open access; publishing under the subscription model is usually free.
The journal's website is authoritative for fees; sources were observed at different times and each keeps its own value, without averaging.
Submission
Article types and submission policies (journal website)
Article types accepted8
- brief communicationsBrief communications. These are notes or short articles, of a technical nature that do not have the scope or extensive results of large studies or engineering p…Length not stated
- data notesData notes. Short peer-reviewed articles that concisely describe the author’s research data stored in a repository.Length not stated
- editorialEditorialLength not stated
- engineering developmentsEngineering developments. Reports on new or improved equipment, materials, processes, or systems used directly or indirectly in lighting, lighting equipment, or…Length not stated
- reviewReviewLength not stated
- scientific research resultsScientific research results. Research results of significant and archival value in those scientific disciplines directly or indirectly related to light.Length not stated
- technical aspects of lighting applicationsTechnical aspects of lighting applications. Technical aspects related to electric lighting, daylighting, lighting controls, standards and innovations in design.Length not stated
- tutorial articles or critical reviewsTutorial articles or critical reviews. Summaries of a technical topic in lighting of general interest, written specifically for study and instructional purposes…Length not stated
Policy excerpts from the journal's websiteOpen access
- Open access Open access
LEUKOS is a hybrid open access journal that is part of the Taylor & Francis Open Select publishing program, giving you the option to publish open access. Publishing open access means that your article will be free to access online immediately on publication, increasing the visibility, readership, and impact of your research. Why choose open access? Increase the discoverability and readership of yo…
Source ↗Publisher website ·
Excerpts are quoted from the journal's website; "model summary" lines are written by Workers AI and checked against the text. The journal's website is authoritative.
Profile
Publication details and official links
- Publisher
- Taylor and Francis Ltd.
- Country or region
- UNITED STATES
- Language
- English
- Frequency
- Quarterly
- ISSN
- 1550-2724
- Electronic ISSN
- 1550-2716
- Society / sponsor
- Illuminating Engineering Society
- Latest issue on the website
- Volume 22, Issue 4 (2026)
- Official links
- Journal homepage ↗OpenAlex
- Submission system ↗Publisher website
- Special issues ↗Publisher website
FAQ
Frequently asked questions about Leukos
What CAS zone is Leukos in?
In the 2025 upgraded edition of the CAS Journal Ranking, Leukos is in Zone 3 of Engineering, and in Zone 3 of the minor category Construction & Building Technology / Optics. In the 2026 Xinrui edition it is in Zone 3 of Engineering. Zones from different editions, and from major and minor categories, are not interchangeable.
What is the impact factor of Leukos?
The latest impact factor listed by LetPub is 1.71; CiteScore 7.1, h-index 46.
How long does peer review take at Leukos?
Based on the dates recorded on 73 articles published between October 2024 and October 2026 (the last 24 months), the median time from submission to acceptance is 244 days (interquartile range 173–398 days); authors report an average review time of over 12 weeks; the community-reported acceptance is “Easy”; the journal's website gives an acceptance rate of 36%. Article statistics cover accepted papers only, publisher figures follow the journal's own definitions, and community reports come from authors' own submissions; none is a promise from the journal.
Where are the editorial board members of Leukos based?
Of the 7 board members whose country the journal's board page names, none are in mainland China; the countries named most often are United States (2), Hong Kong, China (1) and Canada (1). Counted from the institutions listed on the board page; for reference only.
Which databases index Leukos?
According to LetPub and DOAJ records, Leukos is indexed in SCIE and Scopus.
Is Leukos open access, and what is the APC?
Leukos is a hybrid journal. For open-access publication: APC about USD 3,250.
Sources and updates
The facts on this page come from LetPub, Publisher website, OpenAlex; every figure is tagged with its source and the date it was observed, and conflicting values are kept per source. LetPub source page: view ↗ (archived 2026-08-26). Last updated: .