The third group often contain all the accessory electronics
around the LED drivers like resistors, capacitors, coils and
all the connectors ready assembled. The LED drivers from
this group might not be suitable for applications requiring
fast response times if they are optimized for architectural
lighting with high reactive impedance dampening
their response to electromagnetic interference (EMI) emission.
Commercial vendors include Integrated System Technologies
(http://www.istl.com), Osram GmbH (http://www.osram-os.com)
and Philips (http://www.advance.philips.com).