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

Legal & General Group Plc (Group)

Legal & General Investment Management Limited (LGIM)

Legal & General Group Plc (L&G)

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

Legal & General Assurance Society Limited (LGAS & LGPL)

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

18^th June 2010

6. Date on which issuer notified:

22nd June 2010

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

Group - above 5%

LGIM - above 5%

L&G - from 4% to 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	Direct	Indirect	Direct	Indirect
GB0033057794 ORD 1.89p	1,347,500 - L&G Below 5% - LGIM (As on 16/06/2010)		1,825,710	1,762,664	63,046	5.578%	0.199%

 

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

 

Total (A+B)

Number of voting rights	% of voting rights
1,762,664 (L&G) 1,825,710 (LGIM)	5.57% 5.77%

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

Legal & General Group Plc               (Direct and Indirect) (Group)

(1,825,710 - 5.77% = total position)

 

Legal & General Investment Management (Holdings) Limited (LGIMH) (Direct and Indirect)

(1,825,710 - 5.77% = total position)

 

Legal & General Investment Management Limited (Indirect) (LGIM)

(1,825,710 - 5.77% = total position)

 

Legal & General Group Plc (Direct) (L&G) (1,762,664 - 5.57% = LGAS, LGPL & PMC)

 

Legal & General Investment Management (Holdings)                                Legal & General Insurance Holdings Limited (Direct)

Limited (Direct) (LGIMHD)                                                                 (LGIH) (1,063,549 - 3.36% = LGAS & LGPL)

 

Legal & General Assurance (Pensions Management)                               Legal & General Assurance Society Limited

Limited (PMC)                                                                                      (LGAS & LGPL) (1,063,549 - 3.36% = LGAS & LGPL)

                                                                                                                Legal & General Pensions Limited (Direct) (LGPL)

10. Name of the proxy holder:

N/A

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

N/A

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

N/A

13. Additional information:

Notification using the total voting rights figure of 31,600,231

14. Contact name:

Legal & General - Wayne Powell (LGIM) 020 3124 3851

Dialight plc - Nick Giles 01638 778641

Date: 22^nd June 2010