Many of the White Lightning units that are described as WL are the older "coffee can" WL-5,000 or WL-10,000 units (see my illustration). These are great lights and I have been using a pair for over twenty years. Just like the Energizer Bunny, "They just keep going and going!"
These and virtually all other studio strobes can be triggered using a p/c cord from your camera. xxD cameras have a p/c socket but the xxxD cameras don't have a socket and you need to get a hotshoe adapter which will provide the p/c socket.
However, an even better way to fire these strobes is to use an infrared trigger. The IR trigger makes use of the built-in optical slave of the strobe (most studio strobes have optical slaves). The IR trigger fits in the hotshoe of your camera. All you need is line of sight from camera to one of the strobes and the flash from that strobe will trigger any other strobes. I don't know the maximum distance but, I have never had any problems in normal studio setups. I have been using an inexpensive (less than $15) IR sensor for several years and just occasionally need to change the AA batteries it uses. It is a lot more reliable than the cheap radio strobes sold on eBay and by other distributors.
The only slight problem is that you need to be the only photographer shooting flash. Any flash will trigger the optical sensor.
As with most studio strobes, you need to adjust the intensity of the lights manually. You cannot use TTL or E-TTL in shooting your WL units. You can use either a flash meter or work the "by guess and by God method"; taking experimental exposures and adjusting your lighting based on the results. I have been working with my lights for so long that I can just about eyeball the exposure based on what the modeling light looks like.
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