On the local news there was an article on a local lighthouse, Bardsey. Because one of the migrating bird species is getting disorientated by the rotating light on the lighthouse and killing themselves by flying into it. they have removed the incandescent light, all four ton of it, and replacing it with a red LED version. I knew chickens cant see in red light, but did not realise Manx Shearwaters were the same. The article didn't mention Laser so I assume it is a big or several big LEDs. I have LED yard lighting and six or seven watts certainly gives enough light.