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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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MIC-Info: RSA-MD5,RSA,
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 ZTpVQa97+JcsKr9Q1hZC7g==

<SEC-DOCUMENT>0001284552-06-000007.txt : 20061019
<SEC-HEADER>0001284552-06-000007.hdr.sgml : 20061019
<ACCEPTANCE-DATETIME>20061019191226
ACCESSION NUMBER:		0001284552-06-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20060803
FILED AS OF DATE:		20061019
DATE AS OF CHANGE:		20061019

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LIGHTPATH TECHNOLOGIES INC
		CENTRAL INDEX KEY:			0000889971
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				860708398
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0630

	BUSINESS ADDRESS:	
		STREET 1:		2603 CHALLENGER TECH CT
		STREET 2:		SUITE 100
		CITY:			ORLANDO
		STATE:			FL
		ZIP:			32826
		BUSINESS PHONE:		4073824003

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			MAGOS JAMES L
		CENTRAL INDEX KEY:			0001259568

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-27548
		FILM NUMBER:		061154202

	MAIL ADDRESS:	
		STREET 1:		2603 CHALLENGEN TECH COUNT
		STREET 2:		STE 100
		CITY:			ORLANDO
		STATE:			FL
		ZIP:			34787
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>primary_doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2006-08-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000889971</issuerCik>
        <issuerName>LIGHTPATH TECHNOLOGIES INC</issuerName>
        <issuerTradingSymbol>lpth</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001259568</rptOwnerCik>
            <rptOwnerName>MAGOS JAMES L</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>2603 CHALLENGEN TECH COUNT</rptOwnerStreet1>
            <rptOwnerStreet2>STE 100</rptOwnerStreet2>
            <rptOwnerCity>ORLANDO</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>34787</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Corporate VP</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common stock</value>
            </securityTitle>
            <transactionDate>
                <value>2006-08-03</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>5000</value>
                    <footnoteId id="F1"/>
                </transactionShares>
                <transactionPricePerShare>
                    <value>2.41</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>20000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">These shares are a restricted stock award vesting over two years.  They were issued pursuant to the Omnibus Incentive Plan.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>James Magos</signatureName>
        <signatureDate>2006-10-19</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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