一般指稱白天的自然光；而具體指稱太陽的直射光則用「陽光」。

日光(白天自然光)　(P,,U,繁體中文-偏好,D,U,U)
jih kuang(P,,U,韋氏拼音-偏好,UF,U,U)
rì guāng (P,,U,漢語拼音-偏好,UF,U,U)
ri guang(P,,U,漢語拼音(無聲調)-偏好,UF,U,U)
daylight(P,,U,英文-偏好,D,U,N)
light, natural(,U,英文-非偏好,UF,U,N)
natural light(,U,英文-非偏好,UF,U,N)
daglicht(P,,U,荷蘭語-偏好,D,U,U)
luz natural(P,,U,西班牙語-偏好,D,U,U)

藝術與建築詞典根目錄
....關聯概念層面
........關聯概念
............<科學概念>
................<物理科學概念>
....................<物理學概念>
........................<能量與相關概念>
............................能量
................................電磁輻射
....................................光 (能量)
........................................日光 (白天自然光)

product(s) needing/produced by are....

晝光照明

英文....	Use with reference to the natural light of day; for the direct light of the sun specifically, use "sunlight."
荷蘭語....	Te gebruiken met betrekking tot het natuurlijke licht overdag; gebruik 'zonlicht' als specifiek het directe licht van de zon wordt bedoeld.
西班牙語....	Úsese en referencia a la luz natural del día; para la luz directa del sol especificamente, use "luz solar".

日光(白天自然光)............	[AS-Academia Sinica]
.................	國家教育研究院－雙語詞彙、學術名詞暨辭書資訊網 December 27, 2011
.................	中央研究院中英雙語知識本體詞網 December 27, 2011
.................	智慧藏百科全書網 December 27, 2011
.................	牛津當代大辭典 449
daylight............	[VP]
.................	CDMARC Subjects: LCSH (1988-)
.................	RIBA, Architectural Keywords (1982)
.................	Avery Index (1963-)
.................	Random House Dictionary of the English Language (1987) natural light of day
.................	AATA database (1995-) 122643 checked 26 January 2012
light, natural............	[VP]
.................	Getty Vocabulary Program rules
natural light............	[VP]
.................	Getty Vocabulary Program rules
daglicht............	[Bureau AAT]
.................	AAT-Ned (1994-)
luz natural............	[CDBP-DIBAM]
.................	Diccionario de términos científicos y técnicos (1981) 5:2320
Subject:............	[Bureau AAT]
.................	RIBA, Architectural Keywords (1982) Lighting: natural; Lighting: natural: & glare; Lighting: natural: measurement; Lighting: natural: pavement lights; Lighting: natural: & architectural design
.................	AATA database (1995-) 122643 checked 26 January 2012
.................	Van Dale hedendaags Nederlands (1994)

Getty AAT: 300051964 Getty AAT: http://www.getty.edu/vow/AATFullDisplay?find=costume&logic=AND¬e=&subjectid=300051964
聯合目錄： 日光 、jih kuang 、rì guāng 、ri guang 、daylight 、light, natural 、natural light 、daglicht 、luz natural