I routinely use my blue sky "Device" and it works very well for me.

You should be aiming to illuminate your indoor daytime environment with natural outdoor light, not electrical lighting products.

Staring at the blue sky causes insomnia to occur in the human

Vitamin S – The sunlight (S) vitamin, however too much or too little will make you sick.

Light and the human is poorly understood by the astronomical
profession, with many astronomers not understanding which light bulbs they should have in their own
homes and offices! It is embarrassing that astronomers do not understand the many forms of artificial
lighting that they are exposed to every day and how it affects them.

We are all disciples of the light.