Becca Backlight Primer Filter ($38.00 for 1.0 fl. oz.) is supposed to be a “makeup primer to help blur imperfections and impart a radiant glow.” It’s a sheer, golden beige with a luminous sheen and fine pearl. Burberry Nude Radiance No. 01 (P, $48.00) is darker, warmer (95% similar). Becca Moonstone (P, $41.00) is warmer (95% similar). NARS 413 BLKR (P, $30.00) is more shimmery, warmer (85% similar). See comparison swatches / view dupes side-by-side.

I’ve been testing this for a few days under various liquid foundations, and it has worked well with light, medium, and full coverage foundations on my normal-to-dry skin. Even with medium-to-full coverage, the added luminosity of the primer comes through slightly. It can be applied to bare skin for an all-over dewy finish or used under your base of choice. For the photos in the post, I applied it on bare skin and applied a semi-matte finish foundation on top (Guerlain Parure Gold, discontinued) as well as showed it set with loose powder. It extends the wear of my foundation by an hour or so and gives the skin a soft glow while diffusing the skin’s natural texture. I also noticed it helped my foundation spread more smoothly across my face during application. I think the texture of this is thicker, more like a light cream, and less water-like compared to Becca’s Shimmering Skin Perfectors, and it does seem to do more for longevity, but the visual effect is more similar. On my skin tone, when I wear it alone over bare skin, it does noticeably lighten my overall complexion by half a shade. There is a moderately strong, soapy perfume-like scent to it when initially applied, but I don’t notice it much during wear.

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter

Becca Backlight Primer Filter on bare skin (left)

Becca Backlight Primer Filter under Guerlain Parure Gold foundation (left)

Becca Backlight Primer Filter under Guerlain Parure Gold + Urban Decay Naked Loose Powder (left)