What could cause a 3-bulb fixture to blink when turned off?
Is your light fixture is controlled by a dimmer switch?  If so, it might not be capable of properly dimming the more efficient light bulbs.

I had a ceiling light fixture on a dimmer switch.  When I changed from incandescent bulbs to LEDs, the light would blink with the switch turned off.  Not dimmed, off.  I replaced the dimmer with a simple on/off switch and it works as expected now.