Red flashing lights on rear of bike

[Dogface]

Hi All, while driving back from Pta East last night I passed a guy on a bike that had red flashing lights mounted on top of his top-box. He was certainly visible to all road users. I was wondering about the legality of this. Maybe not in red?

 

[TheBear]

 

[BFG]

 

[jangys]

 

[mox]

 

[lecap]

 

[HB 9]

 

[TheBear]

 

[Mikie]

 

[TheBear]

 

[Mikie]

 

[Gerard]

 

[newguy]

 

[TheBear]

 

[dpmza]

 

[Draadwerk]

 

[Tiger8]

 

[teebag]

 

[Xchallenge]

 

[TVB]