Dec 21 (Reuters) - Broadspectrum Ltd BRS.AX :
* Upgrades guidance
* Says company now expects full year underlying EBITDA1 to fall within the $265 million to $285 million range
* Says expect to maintain our gearing levels in the first half of FY 2016, with a material improvement anticipated in the second half of FY 2016
* Says outlook for the company is positive
* Source text for Eikon ID:nASX1pvRBz