How far should my lights be from the tops of my plants

[Headchef710]

Hi guys how far should my lights be from the tops of my plants..

For veg im running 4 300w CFL bulbs

And for flower im running 4 600w HPS bulbs.

I know each light differs but whats a rough size.

Thanks.

 

[Pepperhead]

Veg 4_6inches
16-20 inches for flowering

 

[oldsmokey]

Go with Pepperheads advice.

 

[Headchef710]

Veg 4_6inches
16-20 inches for flowering

Cheers mate appreciate the help!