The phrase "a spectrum of light" is correct and usable in written English.
It can be used when discussing the range of different wavelengths of light, often in scientific or artistic contexts.
Example: "The artist used a spectrum of light to create a vibrant and dynamic painting that captured the essence of the sunset."
Alternatives: "a range of light" or "a variety of light".
Shown above is a spectrum of light.
The film, designed in connection with the United States military during the Cold War, reveals a spectrum of light beyond what the human eye can perceive.
Frequency bands in a spectrum of light from an unknown object compared with bands from known samples can reveal the object's composition.
Frequency peaks in a spectrum of light from an unknown object compared with bands from known samples can reveal the materials of the object.
So I consider getting a S.A.D. lamp, with a spectrum of light calculated to put right one's rhythms and chemistry when they go awry in winter from lack of light exposure.
Downstairs, in the light-box room, the ceiling panel was running through a spectrum of light from graphite to dove gray — standing in the room was like being inside an opal.
If they were able to resolve the Earth and take a spectrum of its light (i.e. look at how much light of each color they were receiving), they would be able to tell that Earth was hospitable to life, by determining its temperature and the presence of large amounts of water on the surface and oxygen in the atmosphere.
What enters the eye is just a spectrum of wavelengths of light, we turn that into something with category boundaries and labels and connotations.
And Jim Hodges's deliberately exposed photograph, which ingeniously casts a tree in a color spectrum of light, is simply ravishing.
HY5 is a positive regulator of photomorphogenesis under a broad spectrum of light, suggesting that it acts downstream of phyA, phyB and the cryptochromes (Chory, 1992).
In contrast, Elongated Hypocotyl 5 (HY5) that acts downstream of multiple families of photoreceptors [ 8- 10] has been genetically characterized as a positive regulator of photomorphogenesis under a broad spectrum of light and affects chloroplast development [ 4, 11].
