"tender light" is a perfectly acceptable phrase in written English.
It is often used to refer to a soft or gentle light, such as candlelight, sunrise, or moonlight. For example, "The tender light of the full moon danced on the lake, reflecting in the still waters."
Spaghetti alla chitarra was set off perfectly with a deeply flavored tomato sauce, accompanied by tender, light meatballs.
There is a dissolve, and when we next see her sad face, in close-up, it is full of a tender light.
In the wide bowlful of tender light the buzzards sail superbly, mewing and turning their pale undersides to the declining sun.
The American artist Lisa Yuskavage paints a flax-haired young woman with a single breast exposed, in tender light; she has sex appeal, but Yuskavage's is a curious rather than lecherous gaze.
Fried calamari (tender, light to the taste, with a thin, ultralight batter, salty and crisp) came in just the right-size portion — large enough to pique the appetite, not so large as to stifle it.
Paul Mealor: A Tender Light: Tenebrae/RPO/Short.
AYRSHIRE FARM Top sirloin roast: very tender, juicy, light beef taste; $20.99.
They were tender and light, and I much preferred them to regular gnocchi, which I find too gummy.
One of my most serendipitous picks was the pirogi, so tender and light it was almost impossible to differentiate between wrapper and filling.
Maryland crab cakes were tender and light, served over crisp haricots verts on a triangular plate with daubs of green goddess sauce at each corner.
Mr. Grasso quotes the theme of Schumann's score in this effective work, whose gauzy, impressionistic colors are meant to evoke (according to the notes) a "peaceful spring scene in the tender morning light".
