[HAM] Hammond Leslie Reverb amp questions

[mike p]

 Hello everyone,

I have some questions regarding the reverb amp found in the 22R leslies ,
the A100 and M100 organs  (early),  and the little Hammond reverb cabinets .

First of all,  are there any differences in the amplifiers found in these 3
applications  ?

Question 2 ,   the little plug in bulb found on the underside-  some amps
have 2 bulbs,  some amps only 1 ,  how does the effect differ and what is
the most desirable way to go...   Also is there a fixed resistor one could
substitute the bulb for or would the dynamics get too out of hand  ?

Question 3 ,   These bulbs again,  I once knew the GE number can anyone name
the part number again for any manufacturer  and are they all the same in
reverb amps,  pilot lights, etc. ?