Ian, you might have a look at Osram TOPLEDs (www.osram-os.com/). Very bright LED= s (11lm/W) which also work well under adverse temperature conditions and of= fer comparably low light ageing. Most probably, the driver circuits in the = DL4 are standard components for which datasheets can be easily found to fin= d out if it works (regarding power handling). Rainer ----- original Nachricht -------- The DL4 was OK as I could see the LEDs associated with each footswitch. I a= sked an engineer about installing brighter ones and he said it depends upon= the current consumption and whether the circuit can cope with it.