halogen bulb light emitting diode bulb

THE PAGES ON
LIGHT BULBS,
SPECTRA,
AND
HUMAN VISION

incandescent bulb compact fluorescent bulb
halogen bulb halogen bulb
light emitting diode bulb incandescent bulb

PAGES ON LIGHT BULB TYPES AND POWER

  1. WHAT'S WRONG WITH THE NEW LIGHT BULBS?
  2. NEW LIGHT BULB DESIGNS
  3. NEW BULB GOES BLOOEY
  4. WE NEED NEW LIGHTBULB SPECIFICATIONS
  5. THE CRAYON TRIALS: How Light Affects Colors
  6. Power Failure Troubles

PAGES ON SPECIAL USES OF LIGHT BULBS

  1. Using LED Christmas Lights, and Other Light Facts
  2. LED Traffic Signals
  3. Color Blindness and Traffic Signals
  4. Build a Full-Spectrum Light Source
  5. Build a Light Source for Color Blindness
  6. Simulate Color Vision Defects
  7. Switching Lamps for Series/Parallel Operation
  8. Using New Tech Bulbs in Stage Lighting
  9. Using New Tech Bulbs in Light Shows

PAGES ON SPECTRA AND HUMAN VISION

  1. Build a Spectroscope
  2. Use a Photo Scanner as a Colorimeter
  3. About Human Color Vision
  4. Human Color Vision Defects
  5. Primary Colors
  6. Autumn Leaf Colors
  7. Visual Distance Perception Modes

OTHER LINKS

  1. Science and Measurement
  2. Home

DANGER

DO NOT BUY OR USE THESE BULBS

dangerous bulb

These imported candelabra-base LED bulbs have enlarged metal ferrules (indicated in diagram) that are connected to the screw shell. An unsuspecting person touching or changing this bulb can contact this live metal part.

  ELECTRICAL SHOCK HAZARD!  

DO NOT USE THIS KIND OF BULB in Christmas light strings or in any socket where the ferrule is exposed. An unpolarized plug on the light string or an open neutral wire in a light fixture can leave the ferrule connected to the live side of the power line.

HOMEMADE SPECTROSCOPE

spectra

Sodium vapor, CFL, and incandescent lamps

Photo made with homemade spectroscope.