Nov 14, 2012

@ 10:46 pm

Induction Lighting has its roots in 19th century science.  The principle of electromagnetic induction was introduced to the world by Nikola Tesla in the 1890’s.  Tesla once lit 200 lamps, without wires, from 25 miles away.

AGT Induction OverviewAn AGT Induction lamp is a highly efficient electrode-less fluorescent lamp that works in much the same way as fluorescent but, instead of electrodes, which are failure points, a frequency generator energizes an external magnetic field. This in turn excites a gas filled vacuum tube to create a luminous circuit.

Under the theory of gas discharge, atoms from a solid mercury amalgam in the vacuum tube reach a high energy level and emit UV light. The UV light is then converted to visible light as it passes through a phosphor coating on the inside of the tube. Unlike standard fluorescent, induction does not have electrodes or other parts that wear out.

Induction has ultra long life, most often twice as long as LED, 5-13 times longer than metal halide and high-pressure sodium lamps, and 5-7 times longer than standard fluorescent lamps.

Excellent lighting distribution, full-spectrum color, and crisp white light, produce much higher Visually Effective Lumens per watt in AGT Induction than LED, metal halide, fluorescent, or high pressure sodium lamps. Simplicity is the core of ultra-long life, AGT Induction Technology.


Lumen Depreciation For Various Lighting TechnologiesInduction Lighting maintains lumen output with clean, crisp light, and no deteriorating color shift. Our vacuum sealed lighting vessel is stable throughout its 100,000 hour life. No other lighting technology out-performs AGT induction



Visually Effective Lumens (VEL) is the measure of lumens factored to account for visual acuity.   Metered foot candle readings only tell half the story measuring the intensity of illumination without regard for the contribution of the eye’s rods in color recognition, and how the human eye processes the light in order to see.

The human eye developed under the full-color spectrum of natural sunlight. The more artificial light varies from natural sunlight, the less effective it is for visual acuity.  AGT Induction is the closest light to the natural, full-color spectrum of sunlight.

VEL reflects a combination of the Color Rendering Index (CRI) of a light source as well as the Kelvin temperature. Induction lighting combines very high CRI with 5,000 Kelvin, and the natural, full-color spectrum of sunlight. The result is excellent acuity. Detail is sharp and colors are true with induction illumination.

VEL Overview

Low Pressure Sodium (LPS) and High Pressure Sodium (HPS) light is characterized by a distinct yellow tint. LPS illumination is as yellow as a caution light. It is however the most efficient technology for producing lumens per watt as measured by a traditional foot candle meter. LPS can produce as many as 200 lumens per watt. But the human eye simply cannot perceive detail in this range. LPS has a CRI of just 5; color contrast is all but lost (see the chart below).

HPS is hardly better. Distinctly yellow illumination blurs detail and distorts color. HPS has a CRI of 22; a light blue car looks green, a red shirt looks orange. Public safety officials are hampered as such details are distorted. Induction lighting has a very high CRI >80 and the same full-color spectrum as the sun.

Induction Light is the closest to natural sunlight of any technology. Traditional light meters do not go far enough in making a distinction between useable light and useless illumination.

The full-color spectrum of the sun is visible when a narrow beam of sunlight passes through a glass prism. The prism forms a band of colors that extend from long red wavelengths, to short violet wavelengths. The waves extend farther in both directions, but cannot be directly perceived by the human eye.

The visible spectrum perceived by the human eye corresponds to wavelengths ranging from about .0004 mm (Violet) to about .0007 mm (Red).

Illumination concentrated in any narrow wavelength is less useful to the eye than illumination that spans the full spectrum. AGT Induction provides more useful light than, HPS, concentrated in the yellow spectrum, or fluorescent, concentrated in narrow wavelengths across the band, or LED that concentrates sharply in narrow bands. The Lawrence Berkeley Labs calculate a multiplier of 1.96 times the foot candles measured by a foot candle meter to determine the useful illumination of Induction.