Black 2 720w / 960w LED Grow Light, Lumii

Lumii Black 2 LED grow light 720/660 fixture has a stunning operating efficacy of around 2.9 µmol/J, and is built using LED chips with individual efficacies of 3.4 - 3.7 µmol/J. It’s maximum PPF output is an impressive 2596 µmol/s when powered at 960 W (by two ballasts each drawing 480 W). By comparison, a 1000 W HPS lamp (drawing 1070 watts) will typically give an output of 1550 µmol/s PPF. 

A very versatile, high-performing, high-efficiency mid-range LED fixture. Lightweight owing to not having an integral driver, it is easy to install. The fixture is made up of two interlocking halves, each having its own power input socket, and it can be hung either as a single interlocked 6-bar fixture or as 2 separate 3-bar fixtures. The 6-bar fixture is ideally suited to cover a growing area of 1.5 m x 1.5 m, whereas 2 separate 3-bar fixtures can cover a growing area up to 25% larger. 

Whether hung separately or interlocked, the 2 half-fixtures can be powered by a single LUMii BLACK 600 W Electronic Ballast using the splitter lead provided. Alternatively, each half fixture can be powered by its own LUMii BLACK 600W Electronic Ballast. Using 2 ballasts allows the maximum light output of the fixture/s to be increased by at least 25%. 

A single ballast can be mounted on the 6-bar fixture, using brackets provided, but if the fixture is hung as 3-bar fixtures, or if 2 ballasts are used, they must be positioned remotely. The open construction of the fixture/s and the very low heat output assist airflow and heat management. Producing full spectrum light ideal for both growth and bloom, the LUMii BLACK² 720/960 LED will give impressive results. Note – Ballast/s not included. 

Key selling points:  

• Powered by the LUMii BLACK Electronic Ballast 
• Very versatile – suits many growing applications 
• Coverage area minimum 1.5 m x 1.5 m, can be increased by up to 25%  
• Light output PPF: 
• 1 ballast – 2071 µmol/s 
• 2 ballasts – 2596 µmol/s 
• Full spectrum light 
• High efficiency 
• Excellent heat management 
• Lightweight 

 
Technical Specifications:   

• Full spectrum LED  
• Light output PPF: 
• 1 ballast – 2071 µmol/s 
• 2 ballasts – 2596 µmol/s 
• Maximum Chip Efficacy PPE – 3.7 µmol/J 
• Optimum Output Efficacy PPE (at 100% / 600W ballast power setting) - 2.9 µmol/J 
• Lifetime - L90 >50,000Hr 
• IP Rating - IP65 
• Overall size: 
• 6 bar fixture – 110 cm x 105 cm x 4 cm 
• 2 x 3 bar fixtures – 110 cm x 52.5 cm x 4 cm each 

 
Power specifications

FAQs:  
Q: Why should I choose LED lighting rather than HID lighting?

A: The advantages of LED are clear. There is little heat output from LED lights, and so heat management is much simpler. Also, the power consumed relative to the light output is far less with an LED fixture than with a HID lamp. With some types of LED light, the spectrum is adjustable to suit either grow or bloom, which is never the case with HID lamps. Other types of LED, such as the LUMii BLACK² 720/960 LED, give full spectrum light suited to both grow and bloom stages, which is not always the case with HID lamps. An LED Fixture gives a much more even spread of light across the canopy, whereas HID lighting must be reflected from a narrow central source – the lamp. 

Q: Should I hang my LUMii BLACK² 720/960 LED as a 6-bar fixture, or as two 3-bar fixtures? Which is best? 

A: This depends upon your grow operation. If you’re growing in a 1.5 m x 1.5 m tent, then it would be best to hang it as a 6-bar fixture. If you have a large grow room, it would be better to set up an array of 3-bar fixtures hung no more than 50 cm apart, to achieve maximum coverage. We recommend that you make a sketch plan of your growing area, and then find the most economical way to hang LUMii BLACK² 720/960 LEDs to light it. 

Q: Is it better to use one or two ballasts? What are the advantages and disadvantages? 
A: This also depends upon your grow, and how you wish to manage it.  
If you use two ballasts, obviously you get more light output, but you can only use 2 of the ballast’s power settings: 

• 75% (400 W) - which gives a light output PPF of 2596 µmol/s 
• 50% (250 W) - which gives a light output PPF of 1883 µmol/s 

If you use only one ballast, you get a lower light output, but you can use all 4 of the ballast’s power settings, giving you more dimmability. The settings are: 

• 115% Boost (600 W Boost) – which gives a light output PPF of 2071 µmol/s 
• 100% (600W) - which gives a light output PPF of 1883 µmol/s  
• 75% (400W) - which gives a light output PPF of 1431 µmol/s 
• 50% (250W) - which gives a light output PPF of 1073 µmol/s 

To take maximum advantage of the fixture’s versatility, we recommend that you have two ballasts, but power the fixture using either one or two ballasts, dependent upon light output required. 

Q: At what height should I hang my LUMii BLACK² 720/960 LED? 
A: We recommend that you should hang your fixture adjustably, using LUMii Rope Ratchets, and that you set the fixture at around 30-50 cm (minimum 15 cm) above the canopy, adjusting the height as your plants grow. If, for your plants, the light is too intense and the plants show signs of stress, raise the fixture a little, or select a lower power setting on the ballast. 

Q: Where should I place the LUMii BLACK 600W Electronic Ballast/s to power the LED Fixture? 

A: There are 2 options: 

1. A single Ballast may be fitted to the 6-bar LED Fixture using the brackets and fixings supplied. 

2. The Ballast/s may be positioned remotely (up to 10 M away) from the LED Fixture using an LUMii Extension/ Link Lead. This is the only option when using 2 Ballasts, or if hanging as two 3-bar fixtures. 

Option 1 is simpler and requires no extra components. However, the heat emitted by the ballast will tend to contribute to the ambient temperature of the growing environment during the light / growing period of the day. 

Option 2 requires the purchase of LUMii Extension/ Link Leads (refer to fixture instructions to select these), but if the ballast is positioned remotely then the heat management of the growing environment is easier, and the Ballast and LED Fixture can be controlled without entry to or disturbance of the grow room.