Remember also that the lens has a poor tint & a lot of them were delivered with varying degrees of damage to the lens.
I bought genuine Jaxman Z1 lenses & fitted them to my Cometa”s.
A much better lens with nicer tint, nicer beam & more lumen output.
With other mods (fitted heavier gauge led wires like it was supposed to have in the first place & did a spring bypasses) I have got the output up to over 1,200 lumens (1,260 iirc) where as stock my Cometa was under 1,000 lumens so short of the claimed 1,300 lumens.