All Daniamant Lifebuoy lights are designed to deliver, as a minimum standard, the 2cd output specification and 2 hour duration required by IMO SOLAS.
 
The L90 uses five alkaline batteries, offering a life of one year.  Robust and reliable, the L90 is automatically activated via a mercury switch after release.
 
IMPORTANT NOTICE:
The original L90 product is obsolete, however spares are still available. The new L90 LED is now available to replace the original L90 and is compatible with the original L90, so there is no need to change your fitted bracket.