Laser Excited Phosphor. These emitters have an extremely high intensity, which allows for a very narrow beam with high range and no spill.

Honestly I have absolutely no use for it. But it's very fun.

https://m.tb.cn/h.5801g5N?tk=VpFdW26Ohxi

This is shared from the app, so I'm not sure how well it's going to work for you.

But you will need a chinese payment method to pay for it. This is going to be very difficult for you, basically you need to know someone from China or at least have a Chinese phone number.

On Taobao. Not sure if you can order this from outside of China though, some sellers allow it, others don't afaik.

I agree that it would be nice to have more engagement here. A weekly diskussion thread is probably a good idea. But I think for now it does not need to have a theme, it could just be something completely different each week. Though it's important that it's something that everyone can participate in, otherwise it will be just an empty thread that is evidence of this place being low on content.

We could start by making a thread where people can suggest topics for the weekly discussions and go from there.