Are these led lights dimmable?

The cords have an on/off rocker switch built in. Generally this style of LED is not dimmable. Each is individually not that powerful. I am adjusting the intensity by adding and subtracting tubes and adjusting the height over the plants. It is working out fairly well. For an 18" x 48" shelf I am using 3 tubes. I just used these this season for seed starting and those plants were just put in the garden. They worked well.

How many lights and what distance for sowing seeds for 48"x24" flats?

We do not use them for seed flats at this time but will likely do so next spring, These are very bright, powerful lights. I would use no more than two 48 inch per flat. Not knowing your location or setup I do not think that these bulbs will generate enough heat without other supplemental heat.

How far apart in parallel should the lights be placed for growing seedlings?

The height would also need to be considered as for spacing in parallel. 12 to18 inch for approx 12 in height

I bought a six pack of 2' lights. the shelf is 16" x 36". How many 2 foot lights per shelf?

I turned my walk in closet into a nursery. I have 3 long shelves around 4’ in length and 2.5’ in depth. I use 2 lights per shelve. That’s been working for me.

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🌿 Grow smarter, not harder — light up your indoor jungle with Barrina brilliance!

EYE CARE LIGHTING - Soft pinkish-white glow reduces eye strain while providing plants with the perfect light balance.
POWERFUL EFFICIENCY - Consumes only 252W while delivering 1400W equivalent brightness—save energy without sacrificing growth.
MODULAR EXPANDABLE - Easily link up to 6 units with included connectors and cords for customizable grow environments.
FULL SPECTRUM BRILLIANCE - Engineered with precise light wavelengths to maximize photosynthesis and boost plant health indoors.
USER FRIENDLY INSTALLATION - Comes with tape, clips, and cable ties for a quick, hassle-free setup—no electrician needed.

The Barrina 4FT T8 Plant Grow Light is a 252W full-spectrum LED fixture designed to replace traditional 1400W grow lights. Featuring 1152 LEDs and a V-shaped reflector, it delivers high PPFD for superior plant absorption while ensuring energy efficiency. The kit includes 6 lights, power cords with switches, connectors, and installation accessories, enabling easy setup and scalable indoor gardening solutions with eye-friendly illumination.

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€ 331.57

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Product Dimensions	119.63 x 3.3 x 3.51 cm; 3.18 kg
Item Weight	3.18 kg
Specific uses	Indoor use only
Finish types	Powder Coated
Is assembly required	Yes
Number of pieces	6
Batteries required	No
Included components	Light kit inlcuded

Barrina4FT T8 Plant Grow Light, 252W(6 x 42W, 1400W Equivalent), Full Spectrum, LED Growing Lamp Fixture for Indoor Plant Growing, with ON/Off Switch & V-Shaped Reflector, Pinkish White, 6-Pack

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