Spot!

[epilot]

Hi,

I want to make a small spot of light at say 10 meter.
The first idea is using a laser pen, but there is a problem with my laser pens,
The spot light of them is not visible when there is a highlight fluorescent in the room.
I want to see the spot of light on the opposite wall at 10 meter max.
Does anyone have any idea please?

I am not thinking about a more powerful laser because I won't like to lose my eyes!

Thanks in advance

 

[justDIY]

use a color that offers more contrast to the wall, and a color your eyes are more sensitive too

for example, a green led of the same power as a red led appears brighter since our eyes are more sensitive to green

10 meters is a LONG ways for any light to travel without being coherent like a laser. you could try something like a 3 degree colaminator and a 5 watt green prolight led

 

[Sceadwian]

Sure, plant an LED and battery in the wall... If you want to move it, you're pretty well stuck, a laser pointer is the only really repositonal light source you're going to get that works at a distance, and something bright enough to be viewed under bright lighting is going to be able to blind someone as well.