blue light
Screen's evening emission
Blue light is visible light at the short-wavelength end of the spectrum, appearing blue to the eye.
In recent usage, blue light most often refers to the type emitted by screens and LED lights, blamed for eye strain and disrupted sleep: I use a blue light filter on my phone at night.
Blue lights on emergency vehicles signal urgency.
A blue light special was a discount announced at Kmart stores.
Wailing alert device
- ambulanceEmergency medical transport
- policeCivil law enforcement
- firefighterEmergency blaze responder
- flashingRepeated brief illumination
patrol · first responder · beacon · warning · roadside · accident · response · urgent
Continuous range of values
- nanometerMetric unit, billion-fold smaller
- visibleAble to be seen
- electromagneticInvolving electric and magnetic fields
- frequencyRate of recurrence
photon · LED · short-wave · high-energy · violet · indigo · optics · refraction
Of discrete data
- LEDSemiconductor that glows
- screenDisplay or barrier
- displayPresentation for viewing
- monitorDisplay or supervisor
smartphone · tablet · computer · device · backlit · pixels · brightness · glare
siren
Wailing alert device
- ambulanceEmergency medical transport
- policeCivil law enforcement
- firefighterEmergency blaze responder
flashing · patrol · first responder · beacon · warning · roadside · accident · response · urgent · dispatch
spectrum
Continuous range of values
- nanometerMetric unit, billion-fold smaller
- visibleAble to be seen
- electromagneticInvolving electric and magnetic fields
frequency · photon · LED · short-wave · high-energy · violet · indigo · optics · refraction · prism
digital
Of discrete data
monitor · smartphone · tablet · computer · device · backlit · pixels · brightness · glare · emission
eyestrain
Overworked vision discomfort
- melatoninCircadian rhythm regulator
- circadianDaily biological cycle
- insomniaPersistent inability to rest
fatigue · retina · macular · headache · filtering · blocking · glasses · protection · wellness · screen time
glasses
Corrective eyewear or tumblers
blocking · amber · orange · night mode · screen protector · eyewear · tinted · reduction · settings
- light spectrumvisible spectrum, spectrum, sunlight, rainbow, wavelength
- Light Biologyphotoreceptors, photoreception, rod cells, retina, optic nerve
- screen ergonomicseye strain, screen brightness, screen breaks, dry eyes, glare
- color therapychromotherapy, color spectrum, color filters, colored lenses, warm colors
- ocean lightunderwater visibility, water clarity, sunlight, irradiance, radiance
- eye strain causesscreen time, bright lights, reading, glare, fluorescent lights
blue lightred light
Traffic control meaning halt
orange light · amber light · warm light · yellow light · infrared light
blue lightwarm light
Yellow-toned, gentle illumination
candlelight · incandescent light · golden light · amber glow · firelight
light, blue, blues, lightly, lighten, lighting, lighter, lightness, bluish