Is there a dimmer to control both incandescents and LEDs at the same time?
Consider:  A tungsten bulb typically has a 2000 hour life span.  A 200 watt bulb will use 400 kWh of electricity in it's life span.  If you are at a typical 12c/kWh rate that means $48 worth of electricity over it's life, many times the cost of the bulb.

How much are you saving by delaying the replacement?