Classic Night Swannies
Swanwick is the brand that popularized blue blockers for sleep. Their orange 'Swannies' are effective at blocking blue light and are a reliable, well-reviewed entry point for those new to circadian optimization.
Ingredients & Purity
Lenses are generally made of BPA-free acetate or polycarbonate. While durable, they lack the high-end optical pigments found in Gold-tier products.
Scientific Evidence
They have conducted independent studies on sleep quality improvements using their glasses, though they are less focused on the 'green light' research than top-tier brands.
Brand Transparency
Moderate transparency; they discuss blue light blocking but provide fewer detailed spectral graphs than Bon Charge.
Value Assessment
Very good value for a recognizable, high-quality brand with a strong track record and excellent customer support.
Why Not Alternatives?
While effective, Swanwick is less transparent about their specific green-light (500-550nm) blocking capabilities compared to Ra Optics or BlockBlueLight, and they often use polycarbonate lenses which have lower optical clarity than CR-39.