Plead NOT GUILTY to both and request a trial with the officer present for both.
Once you get your notice of trial, then request disclosure (officers notes).
Once you get the disclosure and know what it says, then try to setup an early resolution meeting with prosecutor. If they won't meet with you before the trial, then a lot of times they will meet with you right before trial on the day of your trial.
Now let's look at the charges:
Lamps required on all motor vehicles except motorcycles 62. (1) When on a highway at any time from one-half hour before sunset to one-half hour after sunrise and at any other time when, due to insufficient light or unfavourable atmospheric conditions, persons and vehicles on the highway are not clearly discernible at a distance of 150 metres or less, every motor vehicle other than a motorcycle shall carry three lighted lamps in a conspicuous position, one on each side of the front of the vehicle which shall display a white or amber light only, and one on the rear of the vehicle which shall display a red light only.
This one has to do with lights on the front and back of your vehicle (two white/amber ones on the front, and one red one on the back). Did you have another light out on the vehicle besides the license plate one?
Rear lamps to illuminate number plate 62. (19) The lamp on the rear of a motor vehicle or trailer shall be of at least three candela and shall be so placed that it will, at any time from one-half hour before sunset to one-half hour after sunrise and at any other time when, due to insufficient light or unfavourable atmospheric conditions, persons and vehicles on the highway are not clearly discernible at a distance of 150 metres or less, illuminate the numbers on the number plate, or, if provision is made on the number plate or on any attachment furnished or required by the Ministry for affixing the lamp, it shall be affixed in the position or space provided, and the lamp shall face to the rear and reflect on the number plate a white light only. R.S.O. 1990, c. H.8, s. 62 (19).
Was it dark out when this occured?