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HappyLights: The SAD Truth

#sad #verilux Verilux is the market leader for SAD therapy lights. As a lighting researcher, I question some of their marketing claims, especially the claim that their lights provide "10,000 lux" of illumination. ----- LINKS Verilux: WebMD Seasonal Affective Disorder: https://www.webmd.com/depression/guid... Wikipedia Lux: https://en.wikipedia.org/wiki/Lux Wikipedia Lumen: https://en.wikipedia.org/wiki/Lumen_(...) WELL Building Standard: https://www.wellcertified.com/ WELL Circadian Lighting Design: https://standard.wellcertified.com/li... WELL Equivalent Melanopic Lux (Tables L1 and L2): https://standard.wellcertified.com/ta... UPRtek CV600 Spectrophotometer: https://www.uprtek.com/en/product/SPE... Bedtime Bulb: https://bedtimebulb.com/ Note: Links below that are marked with "Affiliate link*" may earn me a commission, account credit, or other bonus. More info at the end of the description. HappyLights (affiliate links*) VT31 Lumi (LED, Brightness Control): https://amzn.to/35kkGZW VT32 Touch (LED, Brightness and Color Control): https://amzn.to/2PffFMB Full-Size (Fluorescent, Brightness Control): https://amzn.to/2rusXfr Compact (Fluorescent): https://amzn.to/2EcKxXZ Studio Lights (affiliate links*) GVM 560AS (my studio light): https://amzn.to/2EadmEf Light Stand: https://amzn.to/34gziZ8 Umbrella: https://amzn.to/2sqU5Mb Light Stand Umbrella Mount: https://amzn.to/2t8edDb ----- Timestamps: 00:00 Introduction 02:18 Product Overview 02:45 Company History and "Natural Spectrum" 04:27 10,000 Lux Claim; Lux vs. Lumens Explanation 08:46 Lux vs. Distance Test; Lamp Positioning 12:03 Melanopic (M/P) Ratio & Melanopic Lux 16:22 Vertical Placement 18:25 LED Measurements; Choosing a Better LED 20:00 Flicker Test 22:49 Final Thoughts ----- FOLLOW ME Website: https://gregyeutter.com Instagram:   / gregyeutter   LinkedIn:   / yeutter   *Affiliate link: I may make a small commission from purchases made after clicking this link. As an Amazon Associate I earn from qualifying purchases.