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Stock Trading History of Ardsley Advisory Partners

The following table details the trading activities (stock purchases, stock sales, and stock option exercises) reported to the Securities and Exchange Commission (SEC) by insider Ardsley Advisory Partners since year 2005. The trader's CIK number is 900529. At the time of this reporting, Ardsley Advisory Partners is the 10% Owner of Lighting Science Group Corp (stock ticker symbol lsgp).

Stock purchases, sales, and option exercises reported by *Ardsley Advisory Partners* since 2005.
Trade Date	Symbol	Company Name (Issuer)	Trade Type	Shares	Price ($)	Value ($)
2007-04-13	LSGP.OB	Lighting Science Group Corp	Purchase	50,000	.27	13,550
2007-04-20	LSGP.OB	Lighting Science Group Corp	Purchase	50,000	.30	14,960
2007-04-17	LSGP.OB	Lighting Science Group Corp	Purchase	25,000	.29	7,310

Insider trading activities including stock purchases, stock sales, and option exercises listed in the above table cannot be completely guaranteed as to their accuracy. For more information regarding the trades made by Ardsley Advisory Partners (10% Owner of Lighting Science Group Corp at the time of this reporting) see the Securities and Exchange Commission (SEC) website.