The LifeGard Blue Spectrum Clip-On USB LED Light with In-Line Controller is a compact, easy-to-use lighting solution designed specifically for nano aquariums, mini reefs, and tanks that house âglow in the darkâ fish or corals. This USB-powered light features 28 bright blue spectrum LEDs that cast a vibrant glow ideal for accentuating fluorescent pigments in aquatic life or creating ambient lighting effects in small tanks. The included in-line four-button controller allows you to power the light on and off, adjust brightness in multiple steps, and tailor output to suit your tankâs needs, from gentle mood lighting to more pronounced illumination. The fixture mounts easily to tank rims up to 6 mm thick with a flexible, rubber-coated gooseneck that can extend out 6â³, letting you position the light exactly where you want it without tools. Running at around 3 W with approximately 60 lumens and 130 lux, this light is ideal for enhancing the natural beauty of your aquatic setup rather than promoting heavy plant growth, and its USB power makes it convenient to plug into adapters, power banks, or desktop ports.