"light seeping through" is grammatically correct and usable in written English.
It refers to a soft and gradual penetration of light into a space or through an object. Example: As she opened the curtains, she felt the warm morning light seeping through, slowly illuminating her room.
I mean, I can see some gray light seeping through the clouds here.
At far left, in the gray dimness of a narrow, cell-like space, a small figure strains toward the golden light seeping through a chink in the wall.
The hilly landscapes are lovely without being picturesque (none of that travel-ad Irish green); the interiors are illuminated by natural light seeping through the windows, without the usual artificial "fill" that pulls faces, or corners of rooms, out of the shadows.
On a recent Sunday evening, the cabinlike saloon (complete with a clapboard façade and Adirondack chairs out front) offered shelter from the biting chill, warmed by a working fireplace, golden light seeping through animal-hide lampshades, and good cheer, as a large party of thirty-somethings heralded a pair of latecomers with whooping and clapping.
They have been turned just a bit cooler than normal to blend with the natural light seeping through the museum's third-floor skylights.
If light seeping through your windows is a problem consider investing in heavier window treatments.
Flat light seeped through bare branches.
Warmth and beams of light seeped through the ceiling.
As dawn's light seeped through the one window, I ceded the room to my sleeping friend and exited onto a little alleyway, where a large group of monks, in orange robes and shaved heads, had gathered for a morning buffet put out for them by residents.
The sun seems to rise late this morning; it's a sort of pale late-fall light, the kind where one doubts its ability to lighten up the entire sky, but in the end, the light seeps through the windowpane and a new day dawns again.
By dusk, pointy houses with orange light seeping from the doorways winked through the forest.
