Dialight plc ("Company")

Director/PDMR Shareholdings

27 April 2017

Options under the Dialight plc 2014 Sharesave Plan ("Plan")

On 26 April 2017, the under mentioned Directors/Persons Discharging Managerial Responsibility were granted options over ordinary shares of 1.89 pence each in the Company (ISIN: GB0033057794) ("Shares") at a price of £8.072 per Share (the ''Option Price''). In accordance with the rules of the Plan, the Option Price represents a 20% discount to the closing middle market price of the Shares as at close of business on 3 April 2017, the dealing day before the invitation to participate in the Plan was made.

The number of options shown above represents the maximum number of Shares over which the options are capable of being exercised (normally from the third anniversary of grant) and will be funded from the related monthly savings contract being opened to fund the Option Price on exercise. The maximum savings are £500 per month in the UK and the local currency equivalent (set on the invitation date) outside the UK.

Participants in the Plan may opt to withdraw from the Plan and be repaid their savings prior to that time.

The above transaction took place outside of a trading venue.

This announcement is made in accordance with Article 19.3 of the Market Abuse Regulation.

Chris Fussell

General Counsel and Company Secretary

Tel: +44 (0) 20 3058 3546