T5, T8 Etc Lighting

[ellena]

Not something I have to worry about atm, but I'm curious

 

[aaronnorth]

it refers to the diameter.

the number is the first digit like so:

T5 = 5/8th of 1"
T8 = 8/8 (or 1")
T10 = 10/8th of 1" (or 1.25")
T12 = 12/8 of 1" (or 1.5")

The smaller the number the more efficient the tube.
Also, T5 give out more watts per square inch so you need as many watts as you would if you used T8 lighting.
T5 penetrate the water deeper too

 

[Truck]

T2's are becoming more popular in the marine side of things too

as you guessed they put out more lumens and inch than T5s etc and are 2/8 of an inch/ 7mm in diameter

 

[mixmaster jay]

i run 4 t5 nightlights and they are brilliant (only 2 working at the mo though) but just as good

 

[ellena]

Thanks guys I'll have a vague idea what I'm talking about if I ever get to upgrade then!