Led lamp for producing biologically-corrected light

A biologically-corrected light-emitting diode (LED) lamp having a color rendering index above 80 and a color temperature between within the range from about 2,500 Kelvin to about 3,500 Kelvin wherein the lamp produces a spectral power distribution that increases spectral opponency to thereby minimize melatonin suppression, the lamp comprising:

• a base;
• a housing attached to the base;
• a power circuit disposed within the housing and having electrical leads attached to the base;
• a driver circuit disposed within the housing and electrically coupled to the power circuit;
• a heat sink disposed about the housing;
• a plurality of LED chips electrically coupled to and driven by the driver circuit;
• and
• an optic diffusing element mounted on the heat sink and surrounding the plurality of LED chips;
• wherein the plurality of LED chips are thermally coupled to the heat sink;
• wherein the plurality of LED chips are blue-pumped white LED chips that produce light having a color temperature of between about 2,700 Kelvin and 3500 Kelvin;
• wherein the driver circuit is configured to drive the plurality of LED chips with a ripple current at frequencies greater than about 200 Hz;
• wherein the optic diffusing element has a color filter applied thereto;
• wherein the color filter is configured to increase spectral opponency to thereby decrease a melatonin suppressive effect of a light output from the plurality of LED chips;
• and
• wherein the color filter has a total transmission of between about 65% and 85%.