Most of these lights seems to have been replaced with a light with a rubber sequential switch which turns on the white LEDS before finally getting to the all important red one. The older light with the sliding switch is better as you don't have to ruin your night vision to turn on the single red LED. I bought two of them originally in case they went out of production.
However, they are still available, I saw them in B&Q today. (This is the Energiser light)
The Lord giveth, the Revenue taketh away. (John 1:16)
I have to go throught 4 white LED sequences before i get to the red one. I just cup the light in my hand so as not to ruin my dark adapted eyes.
Kind of defeats the purpose of the head mount light if you've got to take it off to do this.
I've one of the older models with the selctable switch and I hope it keeps going for years to come.
  