How long are 4FT T5 bulbs
Emma Valentine
Published Feb 26, 2026
2FT T5 HO Fluorescent Tubes4FT T5 Foldable Grow Light StandLength2 feet4 feetPower24WCCT3000K & 6500K
What lengths do fluorescent light bulbs come in?
While there are multiple types of LED and fluorescent tube lights, the three most common are T12, T8 and T5. The terminology comes from “T” for “tubular” and the diameter of the bulb in eighths of an inch, so “T8” represents a tube of 8/8ths of an inch, or 1 inch.
Which is smaller T5 or T8?
The major physical difference between T5 and T8 light bulbs is the length and diameter of the tube itself. The T5 tends to be slightly shorter than the T8 tube, and is significantly smaller in diameter. This factor is important to consider when looking at your fixture, because the two tubes are not interchangeable.
Are all T5 light bulbs the same?
Benefits. T5’s are the first linear lamps to use electronic ballasts only. 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.How much area does a T5 light cover?
T5 light to cover a 2-ft. by 4-ft. area.
What bulb goes in a 4 inch recessed light?
For general lighting, most cans are 4″ or 5″ or 6″. For 4″ cans, you cannot choose BR40 bulbs — they’re too big. For 5″ cans, a BR30 will fit with a little space to all sides while a BR40 will fit with little to no space on the sides.
How far should T5 lights be from seedlings?
Although T5 lights are famous for emitting very little heat, this doesn’t mean you can put the bulbs an inch above plant canopies, as this distance will still damage the plants. The best height for a T5 grow light is about 6-8 in. above the plants, but you should increase that gap to 12 in.
Do fluorescent tubes come in different sizes?
Fluorescent circline tubes are typically 1 and 1/8 of an inch in diameter. Their outside diameter (which is measuring the circle from one end to the other) comes in four options – 6, 8, 12, and 16 inches.How long are T5 good for?
Time: With typical daily photo periods of 8-12 hours, T5 bulbs carry the average life-span is 9-12 months. If it’s been more than 12 months since your last bulb change, it’s probably time for a change.
Can I use T5 bulbs in a T12 fixture?T5 lamps cannot replace T12 or T8 lamps because of differences in physical and electrical characteristics. T5 lamps come in different lengths than T8 and T12 lamps. … Miniature bi-pin sockets fit T5 lamps, while T8 lamps need medium bi-pin sockets.
Article first time published onCan you put a T5 bulb in any fixture?
With retrofit technology you can install T5 lights in older light models and enjoy the benefits of T5 lights even with T8 or T12 grow light fixtures. … The good news are that now there is technology called retrofit kit that lets you transform any T8 or T12 so that it can be fitted with T5 light bulbs.
Is T5 better than LED?
The main advantage of LED over T5 lights is that it is more efficient, which will save cost (bulbs & power) in the long run. … LEDs also do not produce UV light by default (unless UV diodes are used), while florescent lighting does.
What are the best T5 bulbs?
- Hydrofarm Agrobrite FLT24 T5 Grow Light System. …
- DuroLux T5 HO DL844 Fluorescent Grow Light. …
- Prism Lighting Science 4′ 4-Lamp T5 Fluorescent Grow Light. …
- Hydroplanet 4-Foot 4-Lamp HO T5 Grow Light Fixture. …
- Prism Lighting Science 4′, 8-Bulb T5 Grow Light Fixture.
How do I know if my bulb is a T5?
The “T” in T5 indicates the bulb is tubular shaped, while the “5” denotes that it is five eighths of an inch in diameter. The other common lamps are the larger T8 (eight eighths inch = 1″) and T12 (twelve eights inch = 1½” tubes).
What is better for growing T5 or T8?
T5 lamps are smaller and more efficient than T8 bulbs. T5 lights are the winner between the two, they do cost about 2x more than T8 options. While T8s are cheaper upfront, T5s are a more affordable option long-term and are great for most growing needs.
Are T5 lights good for seedlings?
T5 grow lights are often favored over other types of grow light for seedlings because they are less harsh on young plants. They are also preferable to starting seedlings off in a windowsill because they emit a greater amount of the light plants need during this phase of development.
Can you flower with T5?
For the vegging stage of growth, you’ll want to use a T5 fluorescent grow light with a 6400k spectrum of light– that’s going to give you a white/blueish spectrum. When it’s time to flower you’re going to go with a 2700k bulb to give you a yellowish/white spectrum of light that stimulates flower growth.
How many T5 seedlings do I need?
That means you’ll need at least nine 54w T5 bulbs to get your plants where they need to be.
Is T5 full spectrum?
Barrina T5 Grow Lights, Full Spectrum, 2ft 80W (8 x 10W, 500W Equivalent), LED Grow Light Bulbs, Plant Lights for Indoor Plants, Greenhouse, Plug and Play, 8-Pack.
What is the most common size for recessed lighting?
Recessed lights are categorized by their size. The most common residential sizes are 4-inch, 5-inch and 6-inch.
What happens if you use the wrong size light bulb?
Light Fixtures Because of the heat generated, using a light bulb with a higher wattage than specified may cause the light fixture to overheat. Overheating damages the fixture and may melt the socket holding the light bulb, causing a fire.
How far apart should 4 inch recessed lights be?
Generally speaking, recessed lights that are four inches in size should be placed four feet apart. Six-inch lights should be placed six feet apart. In other words, the diameter of the lights equals the space between them.
Is T5 reliable?
Yes, the VW T5 is reputed to be one of the most reliable vans on the road and it is frequent to see well maintained T5’s reaching over 250,000 miles (and even higher). The common problems documented here are minimal considering the model is now approaching 20 years of age.
Is T5 lighting good for plants?
T5 fluorescent bulbs supply high light intensity with very little heat, making them a good choice for growing plants indoors. … A combination of cool spectrum and warm spectrum T5 bulbs supplies the needed blue and red wavelengths for optimum plant growth.
What is the difference between a T5 and T5 1?
The Transporter T5. 1 is the newer, ‘facelift’ version of the well-known T5. It was introduced in 2010 and has a much sleeker and differently shaped front end. The main difference, and way to tell, are the front lights and bonnet shape.
What is the diameter of a T5 tube?
T5 lamps have a diameter equal to 5 times an eighth of an inch, or 5/8″. These lamps are approximately 40% smaller than T8 lamps, which are one inch in diameter, and almost 60% smaller than T12 lamps, which are 1½” in diameter.
Are fluorescent tubes being phased out?
Legislation being brought forward this month will also include the removal of fluorescent lights from shelves from September 2023. … In addition, the government also plans to start phasing out the sale of high-energy fluorescent lightbulbs, with a view to bringing an end to their sale from September 2023.
Can you throw away T5 bulbs?
The answer is you recycle them. Recycling CFL, HID, incandescent or even LED bulbs is easy, because they are smaller in size, meaning that you can usually fit them into one of those bulb recycling containers that can often be found in schools, stores and other social type of places.
What happens if you put LED bulbs in a fluorescent fixture?
Many LED tubes are “plug and play“, meaning you can just install them like you would a fluorescent bulb. For this to be true, look for bulbs that are “ballast-compatible” meaning that they can use the ballast already installed in your fluorescent fixture to power the LEDs.
Are T12 bulbs being discontinued?
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.
Are all T5 bulbs high output?
T5 lamps are available for standard output and high output. The wattages for standard T5 lamps are 14, 21, 28, and 35 watts. The high-output T5 (T5 HO) lamps are available in 24, 39, 54, and 80 watts (49-watt T5 HO lamps are also available from GE Lighting).