Redstone lamp bug

[Tristan1972]

My calculator:
TI Nspire 136mhz HW-B overclocked to 236mhz.

While I was building a restone lamp letters, I built a letter T (3 bocks high, 1 block on each side on top, and on the back is Redstone. There is a delay on the letter, The top will go on, then the bottom if you are in 8 blocks of distance, If you are out of the distance, Everything will look normal, Sometimes. I am running on craft 1.2 (Latest).

Is this normal?

[ThatHackerDudeFromCyberspace]

I can't seem to replicate your issue, how exactly are you powering the lamps?