How many plants can you grow under a 400 watt HPS?

Yield Lab 400W HPS+MH Air Cool Hood Reflector Grow Light Kit (Price: $189.95) — A 400w HPS light provides 55,000 lumens, while a 400w MH light generates 36,000 lumens. This light intensity is enough to provide coverage for 1 to 2 plants.

How far away should a 400W HPS?

For 400W HPS, the best distance from seedlings is between 12 inches or 30.48 cm (closest) and 19 inches or 48.26 cm (furthest). 400W HPS grow lights are the most commonly used HPS grow bulbs. These lights can cover around 16 square feet and produce high yields.

How much area does a 400W HPS cover?

around 16 square feet
400-Watt HPS grow lights are the most commonly used HPS grow bulb, covering around 16 square feet and capable of producing high yields.

Can I veg with 400W HPS?

Metal Halides are great when vegging alot of plants i.e. 20+ or vegging some plants for a long time i.e. 5+ weeks, but IMO if your vegging for 4 weeks and you don’t have alot of plants then CLF/T5’s are the way to go. A 400W(8 tube) T5 Will cover the same amount of space as a 1000w MH light.

Is 400 watt HPS good enough?

When it comes to bulbs, the most commonly used sizes are 400W, 600W and 1000W. As a general rule, 400w HPS bulbs are the most common, 600w HPS bulbs are the most efficient, and 1000w HPS bulbs are the most powerful (but also the hottest).

How many lumens does a 400 watt HPS produce?

50,000 lumens
As a side note: A 400-watt HPS luminaire initially supplies about 50,000 lumens. The rule of thumb is to reduce the HPS lumen output by half to determine the LED lumen output, which would be 25,000 lumens in this case.

How high should my HPS light be?

HPS lights should not be placed inches from the plants, as you would place fluorescent lights; you should set HPS lamps higher, generally between 5 and 8 feet from the plants. Whether you have a reflector with your HPS light makes a difference for how close you can keep it from the plants.

How big of a light do I need for a 4×4 grow tent?

For a 4×4 tent, you should have a grow light having an actual wattage range of 500-600 watts (assuming flowering plants which require a lot of light and are congregated in a single area. Vegetative growth for high-light plants need about half this wattage).

Are HPS lights good for veg?

In response to the general question, can you use an HPS bulb for veg, the answer is yes. Basically you can use just about any light out there for any stage of growth, the real question is how well do each bulb work for veg.

Should I use MH or HPS for veg?

While either type can be used for the full growing cycle, when combined, using an MH grow light for vegetative growth and flowering under an HPS grow light is the most recommended HID grow light setup because utilizing the strengths of both types at the right times produces the best results.

Are HPS lights safe?

High-pressure sodium lights often are used for street and highway lighting. When these lights are turned on, they can produce potentially harmful levels of ultraviolet radiation. However, cracked bulbs or covers can expose workers to harmful UV radiation, often without an individual even being aware.

https://www.youtube.com/watch?v=lLmQYkH8VkM