Since you did not close the question, I will add
'the official' answer:
There will not be any visible difference between appearance of the bulb,
powered by the same voltage and somewhat higher frequency.
There will be no significant change in the lifespan of the bulb.
Comment by rohiththeone-ga is correct. However, it can be argued that
filament, usually made as a coil, has a small, but non-zero impedance.
For that reason current flowing through the filament will be very slightly
less, and therefore life of the bulb a lile bit longer at higher frequency.
Comment by chappy48-ga talks about RF component. RF, a radio frequency,
label covers very wide range, from few to billions of Hertzs.
In the indicated range of interest (50 to 400 Hz) two effects will be combine:
1) with higher frequency the mechanical vibration will get smaller,
meaning longer life
2) the current will be less, also leading a longer life.
The effect would be measurable, but not visible vithout instruments.
More info on effect of the frequency:
Impedance of the coil
Details on lightbulb construction: the metal filament coil
Example of doubly wound filament, efficiency..
".. Thus a typical 100 W bulb for 120 V systems, with a rated light
output of 1750 lumens, has an overall efficacy of 17.5 lumens per
watt, compared to an "ideal" of 242.5 lumens per watt for one type of
white light. Unfortunately, tungsten filaments radiate mostly infrared
radiation at temperatures where they remain solid (below 3683
This is probably my last answer on GA. I hope you find it useful.
I would like to add this (a bit of the topic) public interest message:
" Says David Goldstein, a PhD physicist, MacArthur "genius" fellow, and
senior energy scientist with the Natural Resources Defense Council:
"This could be just what the world's been waiting for, for the last 20
Talking about CFLs:
Please, do rate the answer, and feel free to ask for clarification before you do.