Dialight Regulatory News (DIA)

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:

Voting rights held by a controlled undertaking

3. Full name of person(s) subject to the notification obligation:

FIL Limited

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

See Section 9

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

26 November 2015

6. Date on which issuer notified:

28 November 2015

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

5%

8. Notified details:

A: Voting rights attached to shares

B: Financial Instruments

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

Total (A+B+C)

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 acquire:

12. Date on which proxy holder will acquire voting rights:

13. Additional information:

N/A

14. Contact name:

FIL Limited - Sally-Ann Hatton fil-regreporing@fil.com (01737 837148)

Dialight plc - Nick Giles (01638 778641)

Date: 30 November 2015