ray
as in a ray of light
A three-letter word ending in "ux" is "lux," which means a unit of illumination or light.
day as in daylight
joist
day
One seven letter word, One two letter word and a five letter word, One three letter word and a four letter word, One three letter word and two two letter words, Two three letter words, Three two letter words, A two letter word and a four letter word, A six letter word, A two letter word and a three letter word, A five letter word, Two two letter words, A four letter word, A three letter word, or A two letter word.
Ray?
The word you are looking for is "beam" or "ray."
air
pat
A three-letter word ending in "ux" is "lux," which means a unit of illumination or light.
The three-letter word for light that is not "bright" is "dim." It refers to a low level of illumination or brightness, often creating a subdued or muted effect.
The word is "light-year".
Tan is a light brown.
day as in daylight
I-beam
joist
joist