- 100 -
`
`CLAIMS
`
`1.
`
`An indoor light comprising,
`a substrate;
`LED chips arranged on the substrate at intervals with each
`
`other;
`
`a phosphor layer directly or indirectly covering a periphery of
`
`the LED chips and containing a silicone resin and phosphors each
`
`
`having a peak wavelength of a light emission spectrum; and
`
`a cover fixed to the substrate,
`
`wherein mutual absorption occurs in the phosphors, and
`
`
`wherein P(A), B(A) and V(A) satisfy equation (1) below ina
`
`wavelength range in which A is 380 nm to 780 nm, and the indoor light
`
`satisfies expression (5) below in a wavelength range of 400 nm to 495
`
`nm:
`
`780
`P (4) V (A) daz=
`380
`
`780
`B (A) V (A) da
`380
`
`(1)
`
`wherein P(A)/B(A) S1.5
`
`(5)
`
`wherein P(A)
`
`is a light emission spectrum of the white light
`
`
`emitted from the indoor light, B(A)
`
`is a light emission spectrum of
`
`blackbody radiation of a color temperature correspond to a color
`
`temperature of the white light, and V(A)
`
`
`
`
`
`is a spectrum of a spectral
`
`
`
`luminous efficiency, and
`
`wherein a chromaticity variation of the indoor light after
`
`
`continuous lighting of 6000 hours is expressed as a variation of
`
`chromaticity on a CIE chromaticity diagram, and 0.01 or less.
`
`2.
`
`
`The indoor light of Claim 1, wherein the indoor light is
`
`
`configured to be capable of reproducing white light of a color
`
`temperature of 2000 K to 6500 K on a locus of the blackbody
`
`radiation, and white light of any one of correlated color
`
`
`temperatures with a deviation from the color temperature of the white
`
`
`
`
`light being in a range of +0.005 duv.
`
`
`
`
`
`

`

`3.
`
`The indoor light of Claim 2, wherein an interval between each
`
`peak wavelength and a neighboring peak wavelength is 150 nm or less.
`
`- 101 -
`
`4.
`
`
`The indoor light of Claim 2, wherein the phosphors each exhibits
`
`a light emission spectrum having a half-value width of 50 nm or more.
`
`5.
`
`The indoor light of Claim 2, wherein light emission spectra of
`
`the respective phosphors have different peak wavelengths, and include
`
`
`at least one wavelength region where a part of each light emission
`
`spectrum overlaps another light emission spectrum.
`
`6.
`
`The indoor light of Claim 2, wherein the phosphors are a mixture
`
`
`
`of at least three kinds of phosphors selected from the group
`
`consisting of a blue phosphor,
`
`a green phosphor,
`
`a yellow phosphor
`
`and a red phosphor.
`
`7.
`
`The indoor light of claim 6, wherein the mixture of phosphors
`
`comprises a blue-green phosphor.
`
`8.
`
`The indoor light of Claim 6, wherein the blue phosphor is at
`
`
`least one kind selected from between a europium activated strontium
`
`aluminate phosphor having a light emission peak wavelength of 480 to
`
`500 nm, and a europium activated alkaline earth phosphate phosphor
`
`having a light emission peak wavelength of 440 to 460 nm.
`
`9.
`
`
`The indoor light of Claim 6, wherein the green phosphor is at
`
`least one kind selected from among a europium activated orthosilicate
`
`
`
`
`
`phosphor having a light emission peak wavelength of 520 to 550 nm,
`
`a
`
`europium activated B-sialon phosphor having a light emission peak
`
`wavelength of 535 to 545 nm, and a europium activated strontium
`
`sialon phosphor having a light emission peak wavelength of 520 to
`
`540 nm.
`
`10.
`
`The indoor light of Claim 6, wherein the yellow phosphor is at
`
`least one kind selected from between a europium activated
`
`orthosilicate phosphor having a light emission peak wavelength of 550
`
`

`

`to 580 nm, and a cerium activated rare earth aluminum garnet phosphor
`having a light emission peak wavelength of 550 to 580 nm.
`
`
`- 102 -
`
`11.
`
`
`The indoor light of Claim 6, wherein the red phosphor is at
`
`least one kind selected from among a europium activated strontium
`
`Sialon phosphor having a light emission peak wavelength of 600 to
`
`630 nm,
`
`a europium activated calcium nitridoaluminosilicate phosphor
`
`having a light emission peak wavelength of 620 to 660 nm, and a
`
`manganese activated magnesium fluorogermanate phosphor having a light
`
`
`
`emission peak wavelength of 640 to 660 nm.
`
`12.
`
`The indoor light of Claim 1, wherein an average color rendering
`
`
`
`index Ra of the white light emitted from the indoor light is 95 or
`
`
`more, and all of color rendering indexes Ri to Rg and special color
`
`rendering indexes Rs to Ris are 85 or more.
`
`13.
`
`The indoor light of Claim 12, wherein the average color
`
`rendering index Ra of the white light emitted from the indoor light
`
`is 97 or more, and all of the color rendering indexes Ri
`
`to Rg and the
`
`special color rendering indexes Rs to Ris are 90 or more.
`
`
`
`
`
`14.
`
`The indoor light of Claim 1, wherein the phosphors are a mixture
`
`of at least three kinds of phosphors selected from the group
`
`consisting of a blue phosphor,
`
`a blue-green phosphor,
`
`a green
`
`phosphor,
`
`a yellow phosphor and a red phosphor, and wherein the green
`
`phosphor and/or the yellow phosphor is a europium activated
`
`orthosilicate phosphor.
`
`15.
`
`
`The indoor light of Claim 1, which is used for a home, an
`
`office,
`
`a hospital or an art museum.
`
`

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