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For best results when printing this announcement, please click on the link below: http://pdf.reuters.com/Regnews/regnews.asp?i=43059c3bf0e37541&u=urn:newsml:reuters.com:20100527:nRSa6625Ma RNS Number : 6625M

Dialight PLC

27 May 2010

Dialight plc (the “Company”)

Director/PDMR Shareholding

27 May 2010

Awards under the Dialight Performance Share Plan (‘PSP’)

On 26 May 2010 the under mentioned Directors/Persons Discharging Managerial Responsibility, were granted awards that entitled them to acquire ordinary shares of 1.89 pence each in the Company in accordance with the rules of the PSP.

Name          Number of shares           Total number of shares over           % of issued class                    awarded under the PSP                 which incentive awards held following notification

Roy Burton    127,582                       410,878                                          1.3%               Bill Gibbs       8,780                          56,232                                            0.2%               Nick Rowland  6,147                         31,563                                            0.1%               John Doyle    12,260                        12,260                                            0.03%              John Krauter  12,260                        12,260                                            0.03%              Nick Giles    7,801                             7,801                                             0.02%

Dialight Performance Share Plan (‘PSP’) Awards will normally vest on the third anniversary of grant subject to continued employment and the Company’s total shareholder return (‘TSR’) over the three year period relative to the FTSE All Share Electronic/Electrical Equipment Index and the FTSE Small Cap Index. No award will vest if the percentage increase in the Company’s TSR is below the percentage increase in the TSR of the comparator index, 25% of the ordinary shares subject to an award will vest if the percentage increase in the Company’s TSR is equal to the percentage increase in the TSR of the comparator index, rising on a straight-line basis, to 100% vesting if the percentage increase in the Company’s TSR is equal to the increase in the TSR of the index plus 15% per annum. No consideration was paid for the grant of this award and no consideration is due to paid by the participant on the vesting of this award.

This notification is made in accordance with DTR 3.1.4R(1)

Nick Giles

Company Secretary

Tel: +44 (0) 1638 778641

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