OK I've done some simple calculations which reveal the region of numbers we're talking about here.
CD = 1.17
Diameter = 0.23 m
TAS = 250 kt
Force = 465 N
Distance = 55,000 m (30 nm)
Energy = 25,575,000 Joules per light.
How high would this energy lift a B737 at 65,000 kg?
25,575,000 / 9.8 / 65,000 = 40 metres (131 ft) x 2 = 262 ft
If it takes 7 mins to descend 10,000 ft....
Extra rate of descent = 262 / 7 = 37 ft per min.