What does f17 T8 mean?
This âTâ stands for tube and the number that follows is the diameter of the tube. That number is divided into 8 to translate into inches. So a T8 has a one inch diameter.
What is the purpose of a fluorescent ballast?
In a fluorescent lighting system, the ballast regulates the current to the lamps and provides sufficient voltage to start the lamps. Without a ballast to limit its current, a fluorescent lamp connected directly to a high voltage power source would rapidly and uncontrollably increase its current draw.
What does SP35 mean?
LAMP COLOR SPECIFICATIONS.
| Lamp (Fluor.) | Nominal LPW* | Whiteness |
|---|---|---|
| D | 65.0 | Bluish |
| SP30 | 81.3 | Yellowish |
| SP35 | 82.0 | Pale Yellowish |
| SP41 | 82.0 | Pale Greenish |
What does DX mean in fluorescent bulbs?
daylight
“DX” probably means daylight, but, then again, you have to compare the Kelvin rating. 6500K light is a very clean light. Beautiful lighting, but ALL bulbs in a room, should be the same Kelvin rating.
Is F40 same as T8?
This means a T8 lamp is 8/8ths of an inch in diameter, or 1 inch. All F32 and F40 lamps are essentially 4 foot long lamps (47″ if you don’t count the pins). The FR71T12 is actually a 71″ long x 1.5″ diameter lamp that can handle from 80-120w and is typically run at 100w. It uses the different use of the F number.
What are the functions of ballast?
Functions of Ballast
- It provides levelled bed or support for the railway sleepers.
- It transfers the load from sleepers to subgrade and distributes the load uniformly on subgrade.
- It holds the sleepers in a firm position while the trains pass by.
- It prevents the longitudinal and lateral movement of sleepers.