<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0206</schemaVersion>

    <documentType>3</documentType>

    <periodOfReport>2014-11-14</periodOfReport>

    <noSecuritiesOwned>0</noSecuritiesOwned>

    <issuer>
        <issuerCik>0000866970</issuerCik>
        <issuerName>LIGHTING SCIENCE GROUP CORP</issuerName>
        <issuerTradingSymbol>LSCG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001420299</rptOwnerCik>
            <rptOwnerName>Serengeti Asset Management LP</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>632 BROADWAY, 12TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10012</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001627428</rptOwnerCik>
            <rptOwnerName>J.L. Serengeti Management LLC</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>632 BROADWAY, 12TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10012</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001160212</rptOwnerCik>
            <rptOwnerName>LANASA JOSEPH A III</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>632 BROADWAY, 12TH FLOOR</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>NEW YORK</rptOwnerCity>
            <rptOwnerState>NY</rptOwnerState>
            <rptOwnerZipCode>10012</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>1</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeHolding>
            <securityTitle>
                <value>Series J Convertible Preferred Stock</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <footnoteId id="F5"/>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2014-11-14</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F3"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock,par value $0.001 per share (the &quot;Common Stock&quot;)</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>13684210</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
        <derivativeHolding>
            <securityTitle>
                <value>Warrants</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>0.001</value>
            </conversionOrExercisePrice>
            <exerciseDate>
                <value>2014-11-14</value>
            </exerciseDate>
            <expirationDate>
                <footnoteId id="F4"/>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>34450000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>I</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value>See footnotes</value>
                    <footnoteId id="F1"/>
                    <footnoteId id="F2"/>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeHolding>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">Serengeti Asset Management LP acts as an investment adviser to, and manages investment accounts of Serengeti Opportunities MM L.P. and Serengeti Lycaon MM LP. Serengeti Asset Management LP may be deemed, through investment advisory contracts or otherwise, to beneficially own securities owned by Serengeti Opportunities MM L.P. and Serengeti Lycaon MM LP. J.L. Serengeti Management LLC is the general partner of Serengeti Asset Management LP and may be deemed to control Serengeti Asset Management LP and beneficially own securities owned by it. Mr. LaNasa III is the sole member of J.L. Serengeti Management LLC and may be deemed to control J.L. Serengeti Management LLC and beneficially own securities owned by it.</footnote>
        <footnote id="F2">For purposes of Rule 16a-1(a)(2) of the Securities Exchange Act of 1934, as amended (the &quot;Exchange Act&quot;) or for any other purpose, each of the reporting persons disclaims beneficial ownership of the shares reported herein except to the extent of such reporting person's pecuniary interest therein.</footnote>
        <footnote id="F3">There is no expiration date.</footnote>
        <footnote id="F4">The warrants may be exercised during the period beginning on November 14, 2014 (date of issuance) and ending at 11:59 p.m. Eastern Time on the earlier of: (x) November 14, 2019, (y) the date on which the Issuer consummates a Qualified Public Offering (as defined in the Warrants) or (z) the date of any Change of Control (as defined in the Warrants); provided, that if the Issuer has not provided notice to the warrant holder in accordance with Section 2(g) of the Warrant, the exercise period shall be extended until after the date that is five (5) days after the Issuer provides notice of the Change of Control to the warrant holder.</footnote>
        <footnote id="F5">Each share of Series J Preferred Convertible Stock is convertible into approximately 1,053 shares of Common Stock.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>/s/ Marc Baum, Director of Serengeti Asset Management LP</signatureName>
        <signatureDate>2014-12-11</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joseph A. LaNasa III, Authorized Person of J.L. Serengeti Management LLC</signatureName>
        <signatureDate>2014-12-11</signatureDate>
    </ownerSignature>

    <ownerSignature>
        <signatureName>/s/ Joseph A. LaNasa III</signatureName>
        <signatureDate>2014-12-11</signatureDate>
    </ownerSignature>
</ownershipDocument>
