The regs require a minimum LUX level on the floor must be 100lm or greater for 3 hours duration.
LTSP50 Slim Panel Fittings On the 350mA Inverter setting the BAT4.5 will last just over 6 hours at 20% (900 lumens). On the 500mA Inverter setting the BAT4.5 will last just over 4 hours at 20% (900 lumens).
LTSP40 Slim Panel Fittings On the 350mA Inverter setting the BAT4.5 will last just over 4 hours at 20% (760 lumens). On the 500mA Inverter setting the BAT4.5 will last just over 3 hours at 20% (760 lumens).
LTSP70 Slim Panel Fittings On the 350mA Inverter setting the BAT4.5 will last just over 3.30 hours at 15% (570 lumens). Do NOT use 500mA Inverter setting