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Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
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MIC-Info: RSA-MD5,RSA,
 SHf4sv6gkyfIRg8YerkzQB5L4HFcJcQI6tCCK4/AqzFjg114eq5RV5xIjjCr6YdI
 69uY5HmRCMjsfX8fp+kGug==

<SEC-DOCUMENT>0001140361-10-010031.txt : 20100304
<SEC-HEADER>0001140361-10-010031.hdr.sgml : 20100304
<ACCEPTANCE-DATETIME>20100304154657
ACCESSION NUMBER:		0001140361-10-010031
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20100303
FILED AS OF DATE:		20100304
DATE AS OF CHANGE:		20100304

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			Cramer Scott S
		CENTRAL INDEX KEY:			0001408318

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-10233
		FILM NUMBER:		10657238

	MAIL ADDRESS:	
		STREET 1:		N49 W13650 CAMPBELL DRIVE
		CITY:			MENOMONEE FALLS
		STATE:			WI
		ZIP:			53051

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			MAGNETEK, INC.
		CENTRAL INDEX KEY:			0000751085
		STANDARD INDUSTRIAL CLASSIFICATION:	ELECTRONIC COMPONENTS, NEC [3679]
		IRS NUMBER:				953917584
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0701

	BUSINESS ADDRESS:	
		STREET 1:		N49 W13650 CAMPBELL DRIVE
		CITY:			MENOMONEE FALLS
		STATE:			WI
		ZIP:			53051
		BUSINESS PHONE:		262-783-3500

	MAIL ADDRESS:	
		STREET 1:		N49 W13650 CAMPBELL DRIVE
		CITY:			MENOMONEE FALLS
		STATE:			WI
		ZIP:			53051

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	MAGNETEK INC
		DATE OF NAME CHANGE:	19920703
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0303</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2010-03-03</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000751085</issuerCik>
        <issuerName>MAGNETEK, INC.</issuerName>
        <issuerTradingSymbol>MAG</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001408318</rptOwnerCik>
            <rptOwnerName>Cramer Scott S</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>N49 W13650 CAMPBELL DR.</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>MENOMONEE FALLS</rptOwnerCity>
            <rptOwnerState>WI</rptOwnerState>
            <rptOwnerZipCode>53051</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>VP, General Counsel &amp; Corp Sec</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2010-03-03</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>P</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>1500</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>1.48</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1500</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <derivativeTable></derivativeTable>

    <footnotes></footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Scott S. Cramer</signatureName>
        <signatureDate>2010-03-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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