Dent TOUL-4G Time-Of-Use + Run-Time for LightingDent TOUL 4G Small Time of Use Lighting Logger The new TOUL 4G Lighting Logger is an ultra small, battery powered, portable logger used for lighting energy audits. It has a built in photocell to monitor lighting and a sensitivity adjustment to eliminate daylighting and ambient lighting. On Off transition times are recorded and stored in the TOUL 4G. The 5 digit LCD shows total on time and % on time. Use the Lighting Logger to measure total consumption