Why does my tv flicker when I light a lighter?

Im so serious and its buggin me. I was lighting a candle about 8 feet from our 52 inch ( i think) tv and i noticed it sends a line that flickers on the screen. it usually does it in 2 different places. I even tried it about 100 feet away in another room and it still does it. Its one of those long barbarque lighters any ideas? sounds to weird but its happening. kinda scarey too. so lets hear your ideas?
Answer: I dont know maybe to sound from the lighter is on the same wavelength as your TV. When a lawnmower or weedeater is running too close to our house and a TV is on the screen gets lines through it until the machine is away. Also when we run our paper shredder or our salad shooter.
Can anybody give me an idea on..
The lighter works by generating a pulse of high voltages which causes a spark to light the gas cooker or whatever ! An electrical spark radiates a radio frequency pulse which cover about all of the broadcast band which includes TV radio etc. Very early transmitters used a spark transmitter to signal with in fact I think that the Titanic SOS was sent using a spark transmitter !!
Cheers Pete
which is better HD quality? 1080i or..
If your lighter uses a piezoelectric ignition system (that's what makes the spark), as most lighters have nowadays, then you have poor shielding somewhere in the TV or cabling and it's picking up the RFI from the ignitor. Try an older flint type lighter or matches. It won't hurt anything, so you could either live with it, or hire someone to track down the poor shielding issue. If it's a Philips/Magnavox, don't bother, They're poorly shielded and that's just the nature of the beast.