My personal experience with the following IR lasers includes disassembling them, inspecting the workmanship and field testing them with different NV devices
Sirius XTL (domed and undomed) - is fitted with a Yukon x2 magnifying lens. 3 power levels but does not have an illuminated tailcap. The domed version gets rid of the "black hole" but reduces range
Solaris SRX - is fitted with a Yukon x2 magnifying lens . Has an illuminated tailcap and can be supplied with a notoriously unreliable variable power tailcap
Black sun dark engine - is fitted with a Yukon x2 magnifying lens. 3 power levels, but does not have an illuminated tailcap
Lightsabre Wraith with both 850nm and 940nm pills and Yukon x2 and x3 magnifying lenses. Has an illuminated variable power tailcap
All of the above are manufactured in the UK
There's not much difference in the maximum range at which any of these can provide sufficient illumination for a safe shot, and in each case, that range will be further than you are ever likely to shoot
Things like the maximum beam width, illuminated on/off indicator and fully variable power control may, in the end make the difference to which one suits you best
I've never used a dragonfly so can't say if it's better or worse than the 4 listed above, however I note from photographs of it that it does not appear to use the Yukon lenses common to those listed above
These two Cheaper Chinese IR lasers sold by various sellers under various names
The super compact IR laser torch provides IR illumination for your digital or tubed night vision device, with a flood to spot beam. The torch is available in a 950NM covert model ideal for reducing spook of sensitive quarry, i.e boars, rats, rabbits and close range foxes. It is also available in the
www.blackwoodoutdoors.co.uk
This illuminator is roughly equivalent to the on board illuminators in the PARDs
The new Night Blaster compact VCSEL IR laser illuminator, features a focusable head to allow a wide beam or concentrated spot for a longer beam throw. The torch is powered by a single 18650 battery and includes an illuminated tail switch to show the unit is powered on.Features:Laser illumination to
www.blackwoodoutdoors.co.uk
This illuminator has about the same range performance as the 4 listed above, but uses a fresnel lens rather than the heavy, complicated and expensive Yukon lenses.
However, as the beam is tightened, the illuminated spot does tend to wander around in the field of view, which makes permanent alignment a PITA
Cheers
Bruce