add a dimmer to Work light

I don't know if you guys can help me with what I wanna do. I bought 2 different brand of work lights (120V 60hZ) that uses leds board (1600 lumens total) and I wanted to add a dimmer so I can adjust the brightness to my needs.

I looking on the internet and the only dimmer that I can see is a 12-24 V.

the 2 boards gives me 42V and the other one 62V. (DC)

Can I bypass the wiring with this dimmer even if it's not the same spec? if not, what are my option to dim those lights (cheapest way).

here is a link to on of the light, the other is pretty similar (only voltage change):
http://www.ebay.com/itm/Snap-on-Sup...-Outdoor-/321266520959?_trksid=p2054897.l4276

thanks for the help!

You could try just a normal lamp dimmer from the home store, it might work.

If does, and you want something more finished, this would probably also work, as it's essentially the same thing. http://www.harborfreight.com/router-speed-control-43060.html