What lengths do T12 bulbs come in?

Common tube ratings

Tube diameter in 1⁄8 in (3.175 mm) Nominal length Nominal power (W)
T12 4 ft (1,219 mm) 40
T12 5 ft (1,524 mm) 65, 80
T12 6 ft (1,829 mm) 75, 85
T12 8 ft (2,438 mm) 125

Can you still buy T12 bulbs?

In effect since July 2012, the legislation eliminates nearly all 4-foot T12 lamps, some 4-foot T8 lamps, most 8-foot T12 lamps, and almost all standard halogen PAR38, PAR30 and PAR20 lamps from the market. T12 technology is over 80 years old. Since that time, lamps and bulbs have been developed that just work better.

Can I use T8 bulbs to replace T12?

Quick answer first: Any T8 LED tube will also fit a T12 fluorescent fixture!

Are T12 bulbs good for growing?

So when should you use a T12 bulb? Don’t, unless you find one dirt cheap and you use it only for very small seedlings. Instead, full-spectrum high-output T5 lights are best even for seedlings.

How do you convert a T12 fluorescent bulb to LED?

If you’re converting your existing T12 lamps to LED, you have six options to choose from:

  1. Install ballast-bypass linear LED lamps.
  2. Install plug-and-play magnetic and electronic ballast-compatible linear LEDs.
  3. Install electronic ballast-compatible linear LEDs and a new electronic ballast.

What happens if you put a T12 bulb in a T8 fixture?

If you place T12 tubes in a fixture with a T8 ballast, you will wear out the ballast and have to replace it. If you place T8 tubes in a fixture with a T12 ballast, then the tubes will have a shorter life due to a higher current through the tube.

Is T12 brighter than T8?

The Standard T12 lamp produces 2,650 initial lumens per lamp. The standard T8 produces 2,800 initial lumens per lamp, 6% brighter. But the standard T12 lamp produces 2,300 design lumens and the T8 produces 2,660 design lumens.

What is the difference between T12 and T8 fluorescent bulbs?

While both bulbs come in standard lengths, commonly 4 feet, the designation of 8 or 12 refers to the difference in the diameter of the bulb. T8 bulbs are 8/8 inch (a full inch, in other words), while T12 bulbs are 12/8 of an inch in diameter — 1 1/2 inches.

Will a T8 bulb work on a T12 ballast?

Yes, only T8 bulbs will work properly with this ballast. Using T12 bulbs can cause burnout for the bulbs and/or the ballast. As someone else stated the UNIV refers to the input voltage, not the type of bulbs you can use.

Can a T8 led replace a T12?

T8 lamps can serve as a replacement for T12 if they use a two-pin G 13 base, for example. In this case, you can use the same device by checking the requirements in milliamperes for ballast. Otherwise, you need to buy a replacement T12 for magnetic ballast. Or install an electronic ballast to use T8 and T5 bulbs.

Do T8’s fit in T12 fixtures?

In an effort to make LED tube lights compatible with the internal dimensions of most fixtures, you will find that most LED tube lights feature a T8 or 1 inch diameter. They can indeed be used in T12 fixtures.