There is a common misconception that turn-on cycles will decrease the life of an incandescent lamp, this is not the case.

True, most lamps fail when turned on - but at that point they are at the end of their life. If the lamp didn't fail when it was turned on it would have failed in the next few hours in any case.

Only total operating hours have any real effect on lamp life. As a lamp operates the tungsten in its filament changes from a malleable form to a crystalline form - and this is what sets the end-of-life point for the lamp. This change happens gradually as the lamp burns.

Placing an inductor in series with a lamp is a very good way to really, really shorten the life of your timer.

Lamp operating points are optimum - there is nothing to be gained by changing the operating voltage. The only time this can make sense (by using 135V lamps) is when the lamp is an inaccessible place - like a high ceiling - and you need to rent a lift to change the lamp (a better solution is to shoot the architect who put the lamps up there and plaster over the luminaire holes).