[GaKu]

Yesterday the right rear red bulb stopped working so I was looking at the manual to figure out what type I need to buy. It specifies the wattage as 21/5. What kind of specification is this? Is it 21W, 5W or 4.2W ?

[Dazzler]

Yesterday the right rear red bulb stopped working so I was looking at the manual to figure out what type I need to buy. It specifies the wattage as 21/5. What kind of specification is this? Is it 21W, 5W or 4.2W ?

Without doing lots of research (I'm tired and about to go to bed  ) I'm guessing it is dual filament/dual purpose maybe? 5 watt tail light / 21 watt brake light.. I could be wrong, Lester was once. 

Think I'm right..

Narva P21/5W Bayonet BAY15d Premium Globe 12V 21/5W - Globes & Bulbs | Repco Australia

[TerryT]

Yesterday the right rear red bulb stopped working so I was looking at the manual to figure out what type I need to buy. It specifies the wattage as 21/5. What kind of specification is this? Is it 21W, 5W or 4.2W ?

...I'm guessing it is dual filament/dual purpose maybe?  5 watt tail light / 21 watt brake light.

Think I'm right..

Think you are totally right.