What is the difference between t12 and t5 bulbs

Categories: Growers Guide. Tags: T12 , T5 , T8. Blogger, editor and owner of t5fixtures. Interested in gardening related stuff, especially grow lights. Save my name, email, and website in this browser for the next time I comment. Jun 17, 2 Ben Thorton. Ben Thorton. Growers Guide Sep 18, 0. Knowing what energy efficient technology makes the most sense for your facility can be an overwhelming task to figure out.

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T5 lamps are generally rated for 20, hours, as compared to T8 lamps, which are generally rated for 24, hours.

T8 or T12 fixtures must be suspended over 2 feet from the ceiling in order to have effective light. This would be too low for many office buildings where ceilings are rarely high.

With T5 lamps, suspension from the ceiling can be as little as 15 inches. The T5 lamp has a lower mercury content than T8 and T12 lamps, yet it performs with the same or greater efficiency. The lamp has a coating on the inside of its glass wall that stops the glass and phosphors from absorbing mercury. This barrier coating reduces the amount of mercury needed from approximately 15 mg to 3 mg per lamp.

The T5 and T5 HO are the same size, but have different outputs. The T5 has an output of 2, lumens, similar to the T8 output. The T5 HO has up to 5, lumens.

With the T5 HO lamps, fewer lamps can be used on projects, which save money due to less maintenance. The high output and thinness of the lamps lets them be available for indirect and shallower lighting. T5 HO ballasts also have many features such as a dimming function, or operating multiple F54 lamps. One T5 ballast can power one or two T5 lamps of any wattage, because they all run at the same current.

Their different wattages have the same brightness, which stays the same with any length of the product. This rise in temperature can cause the bulb wall to crack. T5 and T5 HO lamps are increasingly used in offices and industrial areas. The T5 HO system can be used in any area with a ceiling higher than 15 feet, including gymnasiums and warehouses.