Source
Spectrum, colour rendering, flux, flicker, power, optics, durability and data quality.
04 / Lamp ratings
Which lamps can we trust?
Examine tested samples, their strengths and weaknesses. A general rating starts the selection; the room and task refine it.
Open Academy · 2026
Alpha Research Project · Working reconstruction · 16 September 2026
This section brings together source data, the principles of the rating and anti-rating, and a reproducible technical selection. The rating will evolve with measurements, testing and feedback. The next stage is an individual ranking for each person and situation.
4,438source records
205brands in the export
61fields per record
4,123replaceable LED samples in scope
Recovered context and new calculations
Alpha Research Project working materials dated 26 May 2026 refer to a positive list of 10 entries, an anti-rating of 5 entries and a database of 4,431 records. The historical PDFs are unavailable for verification. Their exact membership, order and numeric thresholds remain unconfirmed. The tables below were recalculated on 16 September 2026 from the current LampTest export using the explicit editorial rules below. This reconstruction is for discussion; equivalence to the May edition is not claimed.
Historical material names
alpha_research_positive_rating_reference_ru.pdf
alpha_research_anti_rating_reference_ru.pdf
1. Source data and provenance
Measurements: LampTest, Alexey Nadezhin. Analytical framework: Alpha Research Project. The original Windows-1251, semicolon-delimited export is preserved unchanged. Retrieved 16 September 2026. Each sample has its own test date. Identical model names or barcodes can cover different batches or constructions.
The dataset contains 4,325 LED records, 82 incandescent, 28 compact fluorescent and 3 metal-halide records. Current tables include LED sources with a specified socket; base=no, other and empty values are excluded. Strips, some fixtures and other technologies remain in the source file. Comparison concerns measured samples.
LampTest measurements ↗Testing method ↗LampTest score method ↗
SHA-256 · CSV · 2026-09-16
70212ebff29af7052f2035426f24e22c983b1b89620a93338b53c91102d2ef4bSelection results
| positive group | red zone | other in-scope records | incomplete without red flags | outside current selection |
|---|---|---|---|---|
| 158 | 1,081 | 2,863 | 21 | 315 |
Positive selection requires all four metrics. A known red flag is retained even when another metric is missing. Other records simply fall outside the two extreme groups; suitability requires a contextual check.
2. Positive rating: first 10 samples
A draft selection prioritising colour rendering. Positions refer to measured samples. Differences of a few tenths in CRI may be comparable to measurement uncertainty; stable superiority between adjacent places is unproven.
| No. | Sample and date | CRI / Ra | R9 | Flicker, % | Flux, lm: measured / declared | Flux, % | LampTest, 0–5 |
|---|---|---|---|---|---|---|---|
| 1 | Navigator Supervision NLL-A60-9-230-4K-E27-FR-SV ID 3959 · E27 · 29.11.2021 | 98.4 | 97 | 0.3 | 957 / 900 | 106.3 | 5 |
| 2 | Наносвет L293 LE-GX-D-6/GX53/940 ID 3761 · GX53 · 10.03.2021 | 98.3 | 98 | 0 | 571 / 540 | 105.7 | 5 |
| 3 | Navigator Supervision NLL-A60-9-230-4K-E27-FR-SV ID 3958 · E27 · 29.11.2021 | 98.3 | 96 | 0.3 | 951 / 900 | 105.7 | 5 |
| 4 | Наносвет L012 LH-MR16-50/GU5.3/940 ID 3759 · GU5.3 · 10.03.2021 | 98.2 | 98 | 0.6 | 481 / 500 | 96.2 | 5 |
| 5 | Наносвет L018 LH-MR16-50/GU5.3/940/60D ID 3756 · GU5.3 · 10.03.2021 | 98.1 | 97 | 0.8 | 512 / 500 | 102.4 | 5 |
| 6 | Фотон LED FL P45-C 7W E14 4000K ID 3985 · E14 · 22.12.2021 | 98.1 | 96 | 0.8 | 687 / 560 | 122.7 | 5 |
| 7 | Фотон LED FL P45-C 7W E14 4000K ID 3984 · E14 · 22.12.2021 | 98.1 | 95 | 0.7 | 683 / 560 | 122 | 5 |
| 8 | Наносвет L095 LH-GLS-100/E27/940 ID 3732 · E27 · 10.03.2021 | 98 | 95 | 0.3 | 1,117 / 1,100 | 101.5 | 5 |
| 9 | Наносвет L092 LH-GLS-75/E27/940 ID 3735 · E27 · 10.03.2021 | 98 | 95 | 0.4 | 916 / 900 | 101.8 | 5 |
| 10 | Navigator Supervision NLL-G45-6-230-2.7K-E27-FR-SV ID 3953 · E27 · 29.11.2021 | 98 | 91 | 0.4 | 542 / 540 | 100.4 | 5 |
Navigator · ID 3959 · Sample record and grounds
Supervision NLL-A60-9-230-4K-E27-FR-SV
Test date: 29.11.2021
Socket: E27 · Production marking: 0821
Barcode: 4660134805498
Power, W: measured / declared: 8.6 / 9
CCT, K: measured / declared: 4,052 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Наносвет · ID 3761 · Sample record and grounds
L293 LE-GX-D-6/GX53/940
Test date: 10.03.2021
Socket: GX53 · Production marking: 1120
Barcode: 4620004422934
Power, W: measured / declared: 6.2 / 6
CCT, K: measured / declared: 3,977 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Navigator · ID 3958 · Sample record and grounds
Supervision NLL-A60-9-230-4K-E27-FR-SV
Test date: 29.11.2021
Socket: E27 · Production marking: 0821
Barcode: 4660134805498
Power, W: measured / declared: 8.5 / 9
CCT, K: measured / declared: 4,013 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Наносвет · ID 3759 · Sample record and grounds
L012 LH-MR16-50/GU5.3/940
Test date: 10.03.2021
Socket: GU5.3 · Production marking: 1120
Barcode: 4620004420121
Power, W: measured / declared: 4.8 / 5
CCT, K: measured / declared: 3,963 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Наносвет · ID 3756 · Sample record and grounds
L018 LH-MR16-50/GU5.3/940/60D
Test date: 10.03.2021
Socket: GU5.3 · Production marking: 1120
Barcode: 4620004420183
Power, W: measured / declared: 5 / 5
CCT, K: measured / declared: 3,944 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Фотон · ID 3985 · Sample record and grounds
LED FL P45-C 7W E14 4000K
Test date: 22.12.2021
Socket: E14 · Production marking: 0721
Barcode: 4630055089376
Power, W: measured / declared: 6.4 / 7
CCT, K: measured / declared: 3,811 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Фотон · ID 3984 · Sample record and grounds
LED FL P45-C 7W E14 4000K
Test date: 22.12.2021
Socket: E14 · Production marking: 0721
Barcode: 4630055089376
Power, W: measured / declared: 6.4 / 7
CCT, K: measured / declared: 3,791 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Наносвет · ID 3732 · Sample record and grounds
L095 LH-GLS-100/E27/940
Test date: 10.03.2021
Socket: E27 · Production marking: 1120
Barcode: 4620004420954
Power, W: measured / declared: 10.9 / 11
CCT, K: measured / declared: 3,917 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Наносвет · ID 3735 · Sample record and grounds
L092 LH-GLS-75/E27/940
Test date: 10.03.2021
Socket: E27 · Production marking: 1120
Barcode: 4620004420923
Power, W: measured / declared: 8.9 / 9
CCT, K: measured / declared: 3,912 / 4,000
All four positive-selection criteria are met.
Open LampTest measurements ↗Navigator · ID 3953 · Sample record and grounds
Supervision NLL-G45-6-230-2.7K-E27-FR-SV
Test date: 29.11.2021
Socket: E27 · Production marking: 0821
Barcode: 4660134805429
Power, W: measured / declared: 5.9 / 6
CCT, K: measured / declared: 2,660 / 2,700
All four positive-selection criteria are met.
Open LampTest measurements ↗3. Anti-rating: first 5 red-zone samples
Records with marked technical deviations under this edition’s rules. Grounds are shown for each entry. Findings refer to the tested sample and date; current batches need retesting. Red-zone status calls for verification before procurement.
| No. | Sample and date | CRI / Ra | R9 | Flicker, % | Flux, lm: measured / declared | Flux, % | LampTest, 0–5 |
|---|---|---|---|---|---|---|---|
| 1 | APIS G4 3W 220V ID 805 · G4 · 20.05.2016 | 65.3 | -49 | 98 | 70 / 300 | 23.3 | 0.1 |
| 2 | APIS G4 5W 220V ID 804 · G4 · 20.05.2016 | 63.1 | -57 | 98 | 132 / 500 | 26.4 | 0.2 |
| 3 | noname Corn 5.5W ID 28 · E14 · 04.02.2014 | 62.4 | -51 | 72 | 133 / 450 | 29.6 | 0 |
| 4 | noname Yaloo E14-120SMD3528WW ID 27 · E14 · 04.02.2014 | 64.3 | -48 | 75 | 221 / 700 | 31.6 | 0.2 |
| 5 | noname Corn COB 8W ID 24 · E27 · 04.02.2014 | 66.3 | -50 | 97 | 267 / 800 | 33.4 | 0.2 |
APIS · ID 805 · Sample record and grounds
G4 3W 220V
Test date: 20.05.2016
Socket: G4 · Production marking: unknown
Barcode: unknown
Power, W: measured / declared: 1 / 3
CCT, K: measured / declared: 3,263 / 3,000
Measured flux below 50% of declared; Flicker above 40%; CRI below 70; R9 below zero
Open LampTest measurements ↗APIS · ID 804 · Sample record and grounds
G4 5W 220V
Test date: 20.05.2016
Socket: G4 · Production marking: unknown
Barcode: unknown
Power, W: measured / declared: 1.5 / 5
CCT, K: measured / declared: 3,062 / 3,000
Measured flux below 50% of declared; Flicker above 40%; CRI below 70; R9 below zero
Open LampTest measurements ↗noname · ID 28 · Sample record and grounds
Corn 5.5W
Test date: 04.02.2014
Socket: E14 · Production marking: unknown
Barcode: unknown
Power, W: measured / declared: 3.4 / 5.5
CCT, K: measured / declared: 2,812 / 3,000
Measured flux below 50% of declared; Flicker above 40%; CRI below 70; R9 below zero
Open LampTest measurements ↗noname · ID 27 · Sample record and grounds
Yaloo E14-120SMD3528WW
Test date: 04.02.2014
Socket: E14 · Production marking: unknown
Barcode: unknown
Power, W: measured / declared: 4.9 / 7
CCT, K: measured / declared: 2,959 / 3,000
Measured flux below 50% of declared; Flicker above 40%; CRI below 70; R9 below zero
Open LampTest measurements ↗noname · ID 24 · Sample record and grounds
Corn COB 8W
Test date: 04.02.2014
Socket: E27 · Production marking: unknown
Barcode: unknown
Power, W: measured / declared: 5.3 / 8
CCT, K: measured / declared: 3,159 / 3,000
Measured flux below 50% of declared; Flicker above 40%; CRI below 70; R9 below zero
Open LampTest measurements ↗4. Methodology of this working edition
Original ARP framework
Earlier work considered measured and declared flux, power, CCT, CRI/Ra, R9, available Rf/Rg, flicker, practical suitability and specification accuracy. Weak flux, high flicker and poor colour rendering informed the anti-rating. The complete historical formula requires checking against the PDFs.
Comparison unit
One LampTest record with its ID, model, test date and production marking. Repeated names remain separate tests. Different sockets and forms appear in the general technical selection; individual selection will require compatible products.
Explicit positive rules in this reconstruction
CRI ≥ 90, R9 ≥ 50, flicker ≤ 5%, measured flux ≥ 90% of declared; all four values known. These editorial thresholds are open for discussion and do not establish universal suitability.
Positive ordering
CRI descending, R9 descending, flicker ascending, flux percentage capped at 100 descending, then numeric LampTest ID ascending. Displayed flux is uncapped. No weighted ARP score has been introduced.
Red-zone rule and order
At least one known flag: flux <50% of declared, flicker >40%, CRI <70 or R9 <0. Sort by flag count descending, flux percentage ascending, flicker descending, CRI ascending, numeric ID ascending. Unknown sorting values go last.
Calculation and missing values
Flux percentage = 100 × lm / lm_l. Missing or nonpositive declared flux gives an unknown ratio. Empty and nonnumeric entries remain null; zeros remain zero. Negative R9 is retained. Source flicker above 100% is preserved and requires checking the metric definition and measurement method.
LampTest score
The 0–5 column reproduces the source rating field and is not used to order this ARP selection. Read the separate LampTest scoring methodology at the linked source.
Additional parameters
Power, CCT, Rf/Rg and flicker at different voltages are retained in JSON. Socket, dimensions, beam, dimming, driver and thermal conditions require source and installation checks. High efficacy or high CCT alone does not establish a place.
Evidence limits
This export does not supply a full measured spectrum for every row, eye-level mEDI, PstLM/SVM, long-term degradation tests, electromagnetic tests or biological outcomes. Declared lifetime does not establish tested durability. Table position does not predict sleep, health or performance.
Updates and corrections
Keep the date, source snapshot, calculation rules and change history for each edition. Match challenges to the sample ID and test report. New measurements may change order and membership. Commercial participation must not determine ranking.
Fields used to reproduce the calculation
| CSV field | Meaning | Use |
|---|---|---|
| no, brand, model, date, prod | ID, brand, model, test date, production marking | Sample identity |
| cri, r9 | General and red colour rendering | Selection and flags |
| flicker | Source summary flicker percentage | Threshold and order; not PstLM/SVM |
| lm, lm_l | Measured and declared flux, lm | 100 × lm / lm_l |
| p, power_l; color, color_l | Measured and declared power and CCT | Context and sample record |
| Rf, Rg; flicker230/220/207 | Additional rendering; flicker by voltage | Retained where present |
| rating | LampTest overall score | Shown separately |
| type, base | Technology and socket | Selection scope |
Gaps in the source
Empty or nonnumeric field counts across all 4,438 records. Presence of other fields does not establish complete testing.
| cri | r9 | flicker | lm | lm_l | Rf | Rg |
|---|---|---|---|---|---|---|
| 4 | 4 | 61 | 10 | 83 | 2,420 | 2,420 |
5. From general to individual ranking
The general rating describes measured source properties and supplies the initial choice set. An individual ranking will be built for each person, task and situation. The same lamp may occupy different places in different contexts.
Installation
Geometry, reflections, daylight, eye position, glare, dimmer and actual operating settings.
Person and situation
Visual task, time, duration, sleep and work schedule, age group, preferences and observed outcomes.
Compatibility first
Socket, voltage, size, optics, fixture and controls constrain the candidate set.
Specify the scenario
Evening reading, daytime work, checkout, retail, school and cabin contexts need different conditions. Fix weights and mandatory limits before ranking.
Measure the installation
Check task illuminance, eye-level light, spectrum, flicker and glare in the actual operating mode. Keep unknown values visible.
Gather feedback
Observations and verified measurements update the model. Explain changes to the individual ranking.
How context will change selection
| Situation | Factors affecting individual selection |
|---|---|
| Daytime desk work | Visual task, daylight, glare, illuminance and eye position. |
| Reading before sleep | Local lighting, brightness and dimming, duration, habitual sleep schedule, measured spectrum. |
| Retail floor | Product colours, staff tasks, spatial zones, operating schedule and energy. |
| School or cabin | Age group or crew schedule, geometry, duration and installation-specific checks. |
A general technical draft is available now. The questionnaire below collects context and a measurement plan. Personalised ordering of individual lamps is not yet implemented.
For agents and researchers
Use the CSV snapshot and calculation JSON with this method. Preserve sample IDs, dates, unknowns and reconstruction status. Individual recommendations require context and measurements. Medical claims require separate research evidence.
My lighting context
Get a verification plan for the selected conditions. This is a preliminary questionnaire assessment.
Proposed method
What to check first
Status: contextual assessment, without a quality score
Inputs are processed on this page. There is no device connection or submission of the questionnaire to a server.
Principles for the future rating
Verifiability
Retain the source, method, date and operating mode for each result.
Transparency
Show measurements, completeness, limitations and reasons for a personal conclusion separately.
Independence
Proposed rule: disclose commercial participation and keep it from influencing ranking.
Revision
Changes to a model, firmware, installation or evidence trigger reassessment.
Suitability of the routine
Assess timing, transitions, the ability to darken a space and light spill into nearby areas. Keep project principles separate from measured outcomes.
The Academy’s teaching examples below use fictional numbers. They are separate from LampTest measurements.
Five worked teaching cases
Numbers are invented for teaching. No actual sites or brands have been assessed. Measured catalogues require supporting reports.
Office by day
Eᵥ: 450 lx
DER: 0.65
mEDI: 292.5 lx
SVM · PstLM · date · instrument: ?
Next check
Repeat the vertical eye-level measurement on an overcast day; assess glare.
Home before sleep
Eᵥ: 24 lx
DER: 0.3
mEDI: 7.2 lx
SVM · PstLM · date · instrument: ?
Next check
Measure the normal posture and screen light; check safe movement.
Retail floor
Eᵥ: 600 lx
DER: 0.55
mEDI: 330 lx
SVM · PstLM · date · instrument: ?
Next check
Check merchandise, checkout, workplaces and dimming separately.
Sleeping cabin
Eᵥ: 0.8 lx
DER: 0.4
mEDI: 0.32 lx
SVM · PstLM · date · instrument: ?
Next check
Confirm crew sleep timing, light spill and emergency lighting.
Street lighting
Eᵥ: 15 lx
DER: ?
mEDI: ? lx
SVM · PstLM · date · instrument: ?
Next check
Obtain photometry, spill boundaries and site-specific requirements; indoor reference levels alone are insufficient.