British Columbia Aquarium Forums banner
1 - 2 of 2 Posts

·
Registered
Joined
·
12 Posts
Discussion Starter · #1 ·
Has anyone ever heard of T4 lights being used as a light fixture? I saw it on an ad and I wasn't quite sure if it was just a typo, and meant to say T5 instead :confused:
 

·
Registered
Joined
·
506 Posts
Those are real bulb sizes. The number behind the T is the diameter in 1/8" increments. For example T8 is 8 X 1/8" or 1" in diameter. T4 would be 1/2" diameter. Not common yet but definitely coming into the market as T12, T10 and eventually T8 are phased out to to poor efficiency.
 
1 - 2 of 2 Posts
Top