Patent ID: 8994261
Filing Date: 2015-03-31
Classification: C09K,H01J,H05B

Abstract:
1. A lamp which when energized exhibits a correlated color temperature of between about 2000 Kelvin to about 3500 Kelvin and having an improved color quality scale, the lamp comprising: at least one light-emitting element having a light emission when energized; and wherein when said lamp is energized said lamp generates light with a total light emission having delta chroma values as follows: at least two color samples of the CQS are within the parameters −2 to 7 for VS1; −3 to 7 for VS2; −7 to 7 for VS3; at least one color sample of the CQS is within the parameters −2 to 8 for VS4; −2 to 14 for VS5; at least two color samples of the CQS are within the parameters 1 to 25 for VS6; 4 to 25 for VS7; −1 to 15 for VS8; at least two color samples of the CQS are within the parameters −2 to 7 for VS9; −4 to 6 for VS10; −2 to 8 for VS11; at least one color sample of the CQS is within the parameters −1 to 8 for VS12; −1 to 13 for VS13; and at least one color sample of the CQS is within the parameters −7 to 13 for VS14; −9 to 1.2 for VS15, wherein said delta chroma values are measured in the CIE LAB space; with the proviso that the lamp does not comprise an incandescent light-emitting element.