intensity
Set the light's intensity. Meaning depends on light type:
Directional: illuminance in lux (lumen/m²)
Point/Spot: luminous power in lumen
Example: sun's illuminance ≈ 100,000 lux. Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Intensity value
Set the light's intensity from electrical watts and efficiency. Commercial lightbulbs often list wattage; efficiency depends on bulb type:
Incandescent: 2.2%, Halogen: 7.0%, LED: 8.7%, Fluorescent: 10.7% Equivalent to
intensity(efficiency * 683 * watts). Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Electrical power consumed
Efficiency as a fraction (e.g., 0.087 for 8.7%)
Set the light's intensity. Meaning depends on light type:
Directional: illuminance in lux (lumen/m²)
Point/Spot: luminous power in lumen
Example: sun's illuminance ≈ 100,000 lux. Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Intensity value
Set the light's intensity from electrical watts and efficiency. Commercial lightbulbs often list wattage; efficiency depends on bulb type:
Incandescent: 2.2%, Halogen: 7.0%, LED: 8.7%, Fluorescent: 10.7% Equivalent to
intensity(efficiency * 683 * watts). Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Electrical power consumed
Efficiency as a fraction (e.g., 0.087 for 8.7%)
Set the light's intensity. Meaning depends on light type:
Directional: illuminance in lux (lumen/m²)
Point/Spot: luminous power in lumen
Example: sun's illuminance ≈ 100,000 lux. Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Intensity value
Set the light's intensity from electrical watts and efficiency. Commercial lightbulbs often list wattage; efficiency depends on bulb type:
Incandescent: 2.2%, Halogen: 7.0%, LED: 8.7%, Fluorescent: 10.7% Equivalent to
intensity(efficiency * 683 * watts). Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Electrical power consumed
Efficiency as a fraction (e.g., 0.087 for 8.7%)
Set the light's intensity. Meaning depends on light type:
Directional: illuminance in lux (lumen/m²)
Point/Spot: luminous power in lumen
Example: sun's illuminance ≈ 100,000 lux. Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Intensity value
Set the light's intensity from electrical watts and efficiency. Commercial lightbulbs often list wattage; efficiency depends on bulb type:
Incandescent: 2.2%, Halogen: 7.0%, LED: 8.7%, Fluorescent: 10.7% Equivalent to
intensity(efficiency * 683 * watts). Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Electrical power consumed
Efficiency as a fraction (e.g., 0.087 for 8.7%)
Set the light's intensity. Meaning depends on light type:
Directional: illuminance in lux (lumen/m²)
Point/Spot: luminous power in lumen
Example: sun's illuminance ≈ 100,000 lux. Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Intensity value
Set the light's intensity from electrical watts and efficiency. Commercial lightbulbs often list wattage; efficiency depends on bulb type:
Incandescent: 2.2%, Halogen: 7.0%, LED: 8.7%, Fluorescent: 10.7% Equivalent to
intensity(efficiency * 683 * watts). Overrides prior intensity or intensityCandela calls.
Return
This Builder
Parameters
Electrical power consumed
Efficiency as a fraction (e.g., 0.087 for 8.7%)