I use this first thing in the morning. It's compact and easy to set up. The timer button on the side is a little finicky, but for the most it works if I slide my finger across it. It's too soon to tell if I'm reaping any benefits from it, but it provides what is needed and I do enjoy the light and am disappointed when it turns off, so maybe that's a sign it's heading in the right direction.

朝だけ使っています。小さい青空がそこにあるようで自然に笑顔になります。気分が安定して良いと思います。

Works well

朝食の時に使ってます。気分が安定します。午前中だけ使うといい生活リズムになります。試しに午後使ったら寝れなくなりました。かなり明るいので、午前中だけ使うのが1番体調がよかったです。

Very high quality bright blue light. I believe this matches the 200 Blue light lux output seen in many experiments.Things that weren't immediately obvious to me:1. It has an extremely small form factor. The kickstand collapses conveniently into the back, giving this a shape that's basically like a thick tablet. This makes it very easy to pack in, say, a laptop bag or similar. Some light therapy devices are bulky and awkardly shaped, not this one.2. The USB power port make it very easy to use on the go. You can just connect it to your laptop or a portable battery and power it, no need for some hulking power cord and outlet. The device says it's rated for 1 amp, which basically all modern chargers and ports can accommodate.3. The timer setting is optional. If you want the light to stay on as long as you want, you can. I like to use mine for several hours in the morning, so it's good that you don't have to cycle it.Not so good:4. The "low-light" setting feels like it's about 80% the standard level. So you've got "super-bright, pretty-darn bright, and off" as your options. Doesn't bother me as I like the standard, super-bright setting, but if you want lower intensities go elsewhere.5. As this has no mechanical switches, you aren't going to be able to set this to "on", connect this to an outlet timer and use it to turn on automatically at a specific time as part of a wake-up alarm. Which is a real disappointment.UPDATE: I purchased a second unit January 2021. The model has been updated slightly. It now uses a USB-C type connector in the back instead of a USB micro and features a small SMY logo on the top despite the same model number on the back label. Personally I don't like the SMY logo, but it's small enough in a light font that it's not too bothersome. The light intensity and other elements appear unchanged.UPDATE: July 2022- I continue to use both units with my laptop for around 6 hours a day in the early morning. They can be powered over an unpowered USB hub connected to a laptop, and even run off of a mobile power bank. The older one is slightly more dim than the newer one, but it's really only noticeable compared side to side. These do not have limitless lifespan and after several thousand hours of use would be expected to dim a bit. I don't see this impacting their usefulness for at least a few years.UPDATE: November 2022- Lights continue working well.ISSUE- The USB-C lamp appears to not be able to power off of all kinds of ports. A USB laptop charger (USB-PD) with a type C plug appears not to be able to power this. Also connecting this to a type C port on a Microsoft Edge 2 with a USB C port, either directly, through an unpowered hub or through a usb C to type A dongle does not work, but the USB microlamp can be powered with an adapter USB C to USB micro. I think the USB-C lamp then needs whatever power typically comes out of the type A ports (the fatter wider plugs).This is notable because it makes powering the USB-C lamp on the go slightly more challenging if you are not also using a device like a laptop that has a USB-A plug.Your options to power the USB-C lamp then are:>Have a laptop with a type A port and plug in the lamp directly or through a hub>Carry an ordinary USB A power adapter and plug that in where you have an outlet (easy but you may be in a spot without an outlet or limited outlets)>Hope you're in a place with powered USB-A ports (not uncommon on planes, airports and hotels)>Carry around an external USB battery pack and power the lights off of that (works, but your battery may need to be relatively large to power two of these for a long morning. I believe the devices consume substantially less than the 1A they are rated for, don't recall what it is)