Nice enough guy named Dan calling for someone in Maintenance about retro fitting to LED lighting, sounded like the lightbulb scammers but I couldn't be sure. The number was blocked and this is the return number he gave me. He said they work with a reputable energy company in our area (used their name), something about rebates... ok. Still sounded a bit fishy and my Maintenance Mgr wasn't available to let me know if he was legit or not. I don't put through to voicemails or give out emails per company policy thought he tried that route.