6w NUBMO8 with cylindrical correction optics 6x and power adjustment potentiometer,. Exceptional burner at distance
...
https://www.youtube.com/watch?v=AFpZ7i6tdB0
Possibly as low as 500nm very surprised
490 was favourite now definitely 505nm!
This wavelength is just stunning,
...
https://www.youtube.com/watch?v=w0D3-F1rMcE