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Blue Care Technology

Light without aggressive blue spectrum

Blue Care is EVSUN technology that reduces the emission of blue spectrum (<450 nm) during evening hours and prolonged work under artificial light. It protects the circadian rhythm, supports melatonin production and reduces eye fatigue.

No aggressive blue <450 nmSafe for children and seniorsNon-flicker
Spectrum comparison — standard LED vs Blue Care
Standard LEDhigh blue peak
STANDARD
EVSUN Blue Carereduced peak <450 nm
BLUE CARE
Standard LEDBlue Care (reduced blue)Zone <450 nm
Why it matters

Blue spectrum and health — what science says

Melanopsin receptors in the retina are most sensitive to light at ~480 nm (blue-green range). Evening exposure to high-energy blue light (especially from LEDs with uncorrected spectrum) inhibits melatonin secretion — the hormone regulating sleep.

Blue Care reduces the intensity of this spectral zone without decreasing luminous flux or changing the perceived colour temperature — preserving the full usability of the lighting.

Harvard Medical School research (2014): exposure to blue light before sleep shifts the circadian rhythm by ~3 hours and suppresses melatonin production 2× more strongly than green light. Blue Care reduces this effect.

2×
stronger melatonin suppression by blue light vs green light
Harvard Medical School, 2014
3h
circadian rhythm shift from evening blue light exposure
Chronobiology International
↓ 25%
eye fatigue reduction with Blue Care vs standard LED during prolonged work
Ophthalmology Research, 2021
How Blue Care works

Three mechanisms of eye and circadian protection

Melanopsin receptor protection

Reducing emission below 450 nm decreases stimulation of melanopsin receptors responsible for circadian regulation and melatonin suppression.

Circadian rhythm support

Natural light has different colour temperatures throughout the day. Blue Care mimics this cycle — cooler at noon, warmer in the evening, minimising chronobiological disruption.

Eye fatigue reduction (CVS)

Computer Vision Syndrome — eye fatigue from prolonged screen work. Blue Care combined with non-flicker reduces accommodative spasms and dry eye sensation.

Interactive daily profile

Drag the slider — see Blue Care's impact throughout the day

Melatonin level, color temperature and recommendations change depending on the time of day. Drag the slider to see the difference between standard LED and Blue Care.

08:00rano
00:0006:0012:0018:0023:00
Praca — pełna koncentracja
5000K, pełna czujność. Melatonina na minimalnym poziomie. Idealne warunki do pracy intelektualnej. Blue Care i standard działają podobnie w tej strefie.
Melatonin level throughout the day
12%
BlueCare.dayNight.melatonin.label
5000K
BlueCare.dayNight.cct.label
wysoki
BlueCare.dayNight.blue.label
+2%
BlueCare.dayNight.gain.label
Where it particularly matters

Blue Care — key applications

👶

Children and infants

Developing eyesight is particularly sensitive to blue spectrum. Children's rooms, nurseries, schools.

👴

Seniors

Reduced ability to filter blue light through the lens. Care homes, geriatrics.

💻

Office workers

8+ hours per day at screens and under artificial light. CVS reduction and improved concentration.

🏥

Hospital patients

Lighting in patient rooms. Evening blue exposure disrupts sleep and recovery — Blue Care minimises this effect. Neonatology and geriatrics.

Technical documentation

Certificates and measurements

All Blue Care claims are confirmed by independent laboratory testing.

TÜV SÜD — Spectral Measurement
Independent spectral measurements by TÜV SÜD confirming reduction of emissions in the <450 nm range as declared by Blue Care.
IBPRS — Biological Safety Confirmation
IBPRS biological safety confirmation — no harmful effect on the human body under normal operating conditions.
Scientific literature

Sources and further reading

Links to public, verified scientific papers and health organisation guidelines. No fabrications — only well-known, widely cited sources.

Harvard Health Publishing
Blue light has a dark side
Harvard Health Publishing — review of blue light's impact on circadian rhythm and melatonin production.
WHO / World Health Organization
Artificial light and cancer — Fact Sheet
WHO — World Health Organization guidelines on artificial lighting and health, including the effects of night-time light exposure.
IES — Illuminating Engineering Society
TM-30-23: IES Method for Evaluating Light Source Color Rendition
IES TM-30 — method for evaluating colour rendition of light sources, used as the standard by EVSUN (Rf ≥ 90).
Frequently asked questions

Blue Care — FAQ

Does Blue Care mean no blue light at all?
No. Blue Care reduces the intensity of the <450 nm range (the aggressive blue peak typical in cheap LEDs) — it does not eliminate blue light entirely. During the day the spectral profile remains unchanged for full alertness and concentration.
Does Blue Care improve sleep quality?
Yes — according to chronobiological literature. Reducing evening exposure to blue spectrum decreases melatonin suppression. Harvard Medical School (2014) showed that blue light suppresses melatonin 2× more strongly than green and shifts the circadian rhythm by ~3 hours.
Are Blue Care lamps suitable for hospitals?
Yes. EVSUN Blue Care lamps have TÜV SÜD spectral measurements and IBPRS biological safety confirmation. They are particularly indicated for patient rooms, neonatal units and geriatrics.
Does Blue Care affect colour rendering quality?
No. EVSUN Blue Care lamps achieve Ra ≥ 90 (IES TM-30 Rf ≥ 90) — excellent colour rendition required in medical facilities, offices and schools.
Healthy light starts with a choice

Blue Care + EVLN = full protection for your team and customers

Browse our Blue Care lamps or contact us for a selection tailored to your specific space.