Comatra blue light comparison
The three images on the floor show from left to right:
All three of the above images were projected from a distance of 5 metres.
The Comatra system is also the cheapest so I'm told but if you know different please let me know and I'll add the information here.
I would like to point out that I have no financial interest in Comatra products but am simply anxious to promote that which improves forklift safety the best in my opinion. The picture above was supplied by Comatra.
There are also red light warning systems available.