I pulled the stereo and HVAC out of my '98 GS400 this morning to start my green-bulb-to-white-LED swap. Disassembled 'er down to the circuit boards. Looks like I'll need:

8 - T4 Neo Wedge Bulbs (shouldn't be a problem here)
** 14 - small LEDs (short leads) for behind stereo buttons
** 8 - small LEDs (long leads) for HVAC indicator lights

** How do I identify the specs on the bulbs I pulled out so I know exactly which LEDs to order? ...I just don't want to burn anything up or have the LEDs be at 1/2 brightness...

Thanks!