LIM supplies "Survivor Bias Free-Databases" data from many reliable, reputable sources. Many of these vendors provide time-series data as part of our core database. This document lists vendors of optional data packages. For more information on our core data providers, see the Core Data Sets by Source document on the LIM website.
Data from various LIM vendors of US and European Electricity markets is quoted 24 x 7 on an hourly or more frequent basis. Because these markets typically adhere to local time zone patterns, there is a transition each year from the "Summer" clock (Daylight Savings Time or DST in the US) to the "Winter" clock. On the transition day, there are 25 hours in one day. LIM's data warehouse now captures values for the 25th hour and distributes the data to clients as a separate time series.