TR-1: NOTIFICATION OF MAJOR INTERESTS IN SHARES

1. Identity of the issuer or the underlying issuer of existing shares to which voting rights are attached (ii):

Dialight Plc

2. Reason for the notification:

An acquisition or disposal of voting rights

3. Standard Life Investments Ltd

4. Full name of shareholder(s) (if different from 3.):

Vidacos Nominees

5. Date of the transaction (and date on which the threshold is crossed or reached):

27 February 2014

6. Date on which issuer notified:

28 February 2014

7. Threshold(s) that is/are crossed or reached:

5%

8. Notified details:

A: Voting rights attached to shares

Class/type of shares

Situation previous to the Triggering transaction

Resulting situation after the triggering transaction.

Number of shares

Number of voting rights

Number of shares

Number of voting rights

% of voting rights

Direct

Indirect

Direct

Indirect

GB0033057794

1,833,255

1,833,255

1,583,255

0

1,583,255

0.000%

4.871%

B: Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Expiration date

Exercise/Conversion Period/Date

Number of voting rights that my be acquired if the instrument is exercised/converted

% of voting rights


C: Financial Instruments with similar economic effect to Qualifying Financial Instruments

Resulting situation after the triggering transaction

Type of financial instrument

Exercise price

Expiration date

Exercise/Conversion period

Number of voting rights instrument refers to

% of voting rights

Nominal

Delta

Total (A+B+C)

Number of voting rights

% of voting rights

1,583,255

4.871%

9. Chain of controlled undertakings through which the voting rights and/or the financial instruments are effectively held, if applicable:

10. Name of the proxy holder:

11. Number of voting rights proxy holder will cease to hold:

12. Date on which proxy holder will cease to hold voting rights:

13. Additional information:

14. Contact name:

Standard Life Investments Ltd - investments_mo@standardlife.com  Tel: (0131) 245 6565

Dialight plc - Nick Giles 01638 778641

Date: 3 March 2014


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