Measurement results for an Elinchrom ELB 400 studio flash unit (424 Ws).
Quadra HS Head at full charge (t0.1 [sec]): 1/187
Quadra Action Head at 140 Ws (t0.1 [sec]): 1/1713
Generated by the FDM-1T flash duration meter.
Standard visualization has been configured to show the luminous exposure (in lux-seconds) induced by the measured flash as an additional value at the bottom of the screen.
➤ Courtesy of David F. Parker