Is this for LED lights?
No, it's an incandescent bulb.
No this is not an LED light. I searched for a less expensive bulb without luck. These work fine in my UK light (not and LED)
No, it is not an led light.
no this items isn't LED
No. The C4 and C8 lights have two bulbs. If one bulb burns out the other can be used. This lamp is a replacement for either of those bulbs.