The Lamp Type field entry is built up from:
technology + wattage + shape (where needed) + "v" + voltage (where not 120)
Lamp Technologies
i = incandescent, standard tungsten filament
q = quartz incandescent
f = fluorescent tube
mv = mercury vapour
hps = high pressure sodium
lps = low pressure sodium
mh = metal halide
n = neon
hq = halogen quartz
hir = halogen infra-red
cfl = compact fluorescent, external ballast not included
cfb = compact fluorescent with integral ballast on screw base
ht = halogen tungsten
led = light emitting diode
Lamp Shapes
t12 = 1.5" diameter tube
t8 = 1" diameter tube
ut12 = u-tube 1.5" diameter
ut8 = u-tube 1" diameter
par38 = parabolic reflectorized, 4.75" diameter
par30 = parabolic reflectorized, 3.75" diameter
par56 = parabolic reflectorized, 7" diameter
par20 = parabolic reflectorized, 2.5" diameter
a = standard residential bulb, slight pear shape
mr16 = low voltage compact halogen par, bi-pin base
g = globe
r40 = reflectorized 5" diameter
led = light emitting diode
dual = two compact fluorescent fingers
quad = four compact fluorescent fingers
globe = compact fluorescent enclosed to resemble an incandescent bulb
bx = long “biax” compact fluorescent lamp with 4-pin base