The DPL is the big brother to the UPL.  At 26W and 1800 lumens, it gives off twice the light of the UPL without adding a lot of bulk or weight. 

Bulb:  Dual 13W twin-tube compact fluorescent lamps (26W total)
Light output: 1800 lumens
Length:  15" 
Diameter: 3.5" 
Construction:  Polycarbonate outer tube, molded plastic handle.
Approvals: cULus

DPL-25G   25' 16/3 SJT cord

Replacement bulb: DPL-P14