LED lighting specialist Dialight has pleased investors with the announcement of a first sale of its mobile phone mast monitoring and lighting system. The FTSE 250 group said the initial order, which was from a major operator in North America, was valued at just less than $1m but boded well for the product. Chief Executive Officer Roy Burton said: "These orders demonstrate the progress that Dialight has made both in developing our new Cellphone Tower Remote Monitoring and Lighting system and selling our products and services outside of the United States. "We are encouraged that our new system will drive growth in our Obstruction business in North America and further orders should see a return to growth for this business."Dialight made a decision recently to sell directly to the cellphone tower market, rather than through value-added resellers.The Suffolk-based company revealed that the order was for an initial three months call-off with further orders expected from this customer in 2013 and future years as they convert their tower inventory to the new system. Shares in Dialight were up 8.1% to 1,190p at 12:32 on Thursday. OH