Another fantastic Ring Lighting product that we recommend is the Ring RIL0115 Flexible Head Torch. 
 
Designed for close quarter work, this headtorch features a wide field of illumination without being too bright. Producing a sensible 115 lumens output, it will last for up to 4.5 hours (or 5.5 hours on the lower 50 lumen output). We think this product is ideal for the service crew who need to work quickly and unobstructed during a service stop / emergency service.
 
The last feature we love is the rear Red LED lights, to illuminate the wearer, even if facing away from you. We think these are ideal for marshals running a time control. 
 
Key Features:
115 Lumen output
4.5 hours operating time on max power
5.5 hours operating time on low setting of 50 Lumens output
Flexible and adjustable head strap for comfortable wear
Rear red LED light for extra safety when working at night
Rechargeable in 1.5 hours