If you look at the last image it has a chart showing the umol at different heights. But I would be careful place them to close in a real world situation depending on the growth stage of that plant you could cause some leaf burn. These are very powerful lights in small foot print. From my experience with these lights I went down 10" . I've tried it to get to around 150 umol/m2/s aka the sweet spot, but I noticed right away by examining the leaves under a loop I had an issue. I hope this has helped. So I just stick with 12" just to be safe.

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Barrina T8 LED Grow Light 4FT,168W(4 x 42W), 1000W Equivalent, Full Spectrum, V-Shape with Reflector Combo, Grow Lights for Indoor Plants, Greenhouse, 4-Pack

Q: For starting seedlings, is one strip enough to light a 4' x 2' area or should I use 2?

I have them, and I would use 2 to keep the plants from "leaning".

Q: Is this really full spectrum or just 6500K

Dear customer, These lights are not 6500k. They are full spectrum.The spectrum is different from shop light. Our listing shows the spectrum graph. Please check. Thank you so much.

Product ID: 741942599

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Details

Brand
Barrina
Color
Pinkish White
Material
Aluminum
Style
Modern
Light fixture form
Ceiling

Frequently Bought Together

Barrina LED Grow Light 4FT,168W(4 x 42W, 1000W Equivalent), Full Spectrum, V-Shape with Reflector Combo, Grow Lights for Indoor Plants, Greenhouse, 4-Pack

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Description

Barrina T8 LED Grow Light 4FT,168W(4 x 42W), 1000W Equivalent, Full Spectrum, V-Shape with Reflector Combo, Grow Lights for Indoor Plants, Greenhouse, 4-Pack

Specifications

Brand	Barrina
Color	Pinkish White
Material	Aluminum, Polycarbonate
Style	Modern
Light fixture form	Ceiling
Room Type	Indoor
Product Dimensions	47.1"L x 1.3"W x 1.38"H
Specific Uses For Product	Indoor use only
Indoor/Outdoor Usage	Indoor
Power Source	AC
Installation Type	Linkable Ceiling Mount
Special Feature	Energy Efficient, Full Spectrum
Number of Light Sources	4
Voltage	120 Volts
Light Color	Pinkish White
Shape	T8
Included Components	Light kit inlcuded
Warranty Type	Extended or Limited
Lighting Method	LED
Item Weight	2 Pounds
Number of Items	4
Wattage	42 watts
Controller Type	Push Button
Switch Type	Push Button
Unit Count	4 Count
Brightness	2900 Lumen
Efficiency	High Efficiency
Mounting Type	Ceiling Mount
Shade Color	white
Fixture Type	Removable
Assembly Required	No
Manufacturer	Bailina Lighting Electric Appliance Co.,Ltd
Part Number	INWT80421265Ec
Item Weight	2 pounds
Country of Origin	China
Item model number	INWT80421265Ec
Collection	led grow light
Special Features	Energy Efficient, Full Spectrum
Plug Format	plug in
Batteries Included?	No
Batteries Required?	No
Beam angle	270 Degrees

Have a Question? See What Others Asked

What is the Kelvin number? I need grow lights that are good for microgreens.

What is the umol/j

For starting seedlings, is one strip enough to light a 4' x 2' area or should I use 2?

Is this really full spectrum or just 6500K

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