Yes, the skyline LED lights do emit blue light. The blue light is naturally emitted by the sun and plays an essential role in the regulation of our sleep-wake cycle, mood, and cognitive performance. It is omnipresent in our daily lives. The Skyline lights are designed based on the sun spectrum LED technology that simulates the true and natural light, it offers every benefit that the sunlight brings to you, therefore contain similar relative levels of blue light in the spectrum as natural light. The Skyline lights reaches 98+ CRI to make everything vivid, they are perfect for entrances, basements, and rooms with less sunlight. The lights will provide the natural light but with stronger effect for your energy boost which is helpful with waking your brain up effectively and healthily. They are same to the sunlight and better that the sunlight. For more concerns, please see our SunWave tech.