MYBROSHI, it is the 1196 bulb, here is a link to a bulb size guide for the T100
http://www.modifiedlife.com/1994-toyota-t100-light-bulb-socket-size-guide/
http://www.modifiedlife.com/1994-toyota-t100-light-bulb-socket-size-guide/
Just be advised altering the color of the reverse lights is illegal. Also your insurance company can void your policy if they find out you have illegal equipment on your vehicle.just got some blue led reverse lights off ebay (coming from hong kong as well so 10-15 days haha) but they were only 3 bucks.
http://cgi.ebay.com/ebaymotors/2-pcs-x-1156-12-LED-Bulb-Car-LED-Light-High-Power-Blue-/310237864274?pt=Motors_Car_Truck_Parts_Accessories![]()
I sure hope they fit through the tail light hole.... if not i may have to try to find some 6 led ones instead of 12 led but i will cross my fingers for now![]()