Flexmod P3 Big Test Load

Planning to run four 445nm diodes in series at approx. 1.2 A from a single Flexmod P3. The test load for setting the driver's current would seem cumbersome if I used something like 18 diodes in series. Is there a good set up for these higher voltages?

Read the manual. If I remember correctly, you just hook up your ammeter to the output leads.