Start with the news release AC/DC power supplies can be used in LED signage from TDK-Lambda, which we summarised at the time by saying "TDK-Lambda's ZWS-BAF series of PCB-type AC/DC power supplies is designed to meet the demands of a range of applications, including factory automation, test and measurement, and LED signage. ". Several months prior to that, we featured the news release Power Sources releases low-profile power supplies from Power Sources Unlimited: "Power Sources Unlimited has announced the Tracopower TBL Series of low profile DIN rail power supplies.".
 
In July 2008, we covered the news from Lambda - take a look at Power supplies cater for short-term peaks which says: "Units provide a very cost and space efficient solution compared with oversizing conventional power supplies just to handle the peak current.".
 
Take a look also at the news release from Young Electronics Group, Power supplies are approved for medical uses, as well as Single-output switchers add medical options from Lambda, and Industrial power supplies have five-year warranty from Lambda.