From the Lightning website (not the picture, though):

The Tampa Bay Lightning will unveil their new third jerseys this Sunday when they take on the New Jersey Devils at 5 p.m. (Sun Sports, WDAE 620 AM).  This is the second time in franchise history the Lightning will don an alternate jersey. The first was unveiled prior to the 1996-97 season.

The third jersey will go on sale in the Tampa Bay area on Monday, November 24.  Any fan who purchases the jersey at their local Champs Sports will also receive two free tickets to a future Lightning game.  TampaBayLightning.com will also host a ‘photo blog’ from team photographer Scott Audette as the Lightning prepare to unveil their new sweaters.

In addition, the first 5,000 fans on November 26 against the New York Rangers will receive a Vincent Lecavalier third jersey t-shirt. 

The Lightning have also unveiled their 2008 Holiday Packs.  The packs include four tickets, a third jersey t-shirt and a Chick-fil-A calendar starting as low as $65.  For more information, or to order a Lightning Holiday Pack, fans should call (813)301-6600 or visiting Tampabaylightning.com.

Tampa Bay will wear the alternate jerseys on 14 different occasions this regular season:

Date Opponent
November 23 vs New Jersey Devils
November 26 vs New York Rangers
December 6 vs Buffalo Sabres
December 18 vs Colorado Avalanche
December 30 vs Montreal Canadiens
January 19 vs Dallas Stars
January 30 vs Philadelphia Flyers
February 14 vs Washington Capitals
February 22 vs Boston Bruins
March 3 vs Pittsburgh Penguins
March 17 vs Toronto Maple Leafs
March 21 vs Atlanta Thrashers
March 29 vs Ottawa Senators
April 7 vs Pittsburgh Penguins