Bonjour,

Maximum Watt/Seconds Each Monolight: 1000
Guide Number Each Monolight: 270 in feet @ ISO 100
Recycle Time 3 sec @ full power
Flash Duration Not Specified by Manufacturer
Flash Variability 5 f/stops - full to 1/16 power in 1/10 top increments
User Replaceable Flashtube Yes (INT528)
Changeable Reflector Yes - "S" Bayonet mount
Modeling Light Wattage 250 (INT500)
Voltage Stabilization No
Flash Ready Indicator LED and switchable audible
Operating Voltage 110-120VAC, 15A
Sync Voltage 4.3VDC
Built-in Slave Cell Yes, optical
Circuit Protection 15A
Fan Cooled Yes
Auto Dump Yes
Dimensions Each Monolight: 20 x 10 x 5.5" (50.8 x 2.54 x 14cm) (LxWxD)
Weight Each Monolight: 6 lbs (2.7kg)
Kit Weight 42 lbs (19kg)
Packaging Info
Package Weight 54.0 lb
Box Dimensions (LxWxH) 40.5 x 17.0 x 15.5"