Lunera strongly recommends powering down the ballast prior to lamp installation for two reasons:

-          Hot removal of an operating lamp from a ballast is the most stressful operating point for a ballast causing a live arc to be struck and may cause the failure of old ballasts in the field.

-          Some ballasts from Philips and others will go into a safe mode hen the Lunera CFL LED lamp is hot installed which can only be cured with a power cycle.  Some customers have interpreted this as a ballast or lamp failure and have incurred additional costs as a result.