Q&A of the day - Lux answers your lighting questions

Lighting is a constantly changing sphere, with a whole host of new developments and innovations to stay on top of. To make this task a little easier we have recruited a panel of experts to help solve your lighting queries and questions.

Click in the categories below to find the questions and answers.

 

 

If you’d like to ask a question about Lighting, write to our Application Editor, John Bullock: askjohn@luxreview.com

 

Categories

 

Smart Lighting 

Is it possible to convert an existing lighting installation to ‘smart control’?

This question has been answered by Stefan Bernards, proposition manager, light controls, at Nedap.

 

How does Power over Ethernet (PoE) lighting work?

This question was answered by the technical team at Igor.

 

What does it look like to install PoE and who can do it?

This question was answered by the technical team at Igor.

 

What are the practical benefits of PoE and what can be powered and controlled by PoE today?

This question was answered by the technical team at Igor.

 

Can I install PoE at home, and what would that look like to me?

This question was answered by the technical team at Igor.

 

Do standards exist for Bluetooth connected lighting technology?

This question was answered by the technical team at Silvair.

 

So, what is Power over Ethernet?

Answered by Akshay Thakur, business development manager of the industries and IoT product group at Cisco

 

Can you use standard RJ45 network cable with a PoE installation?

This question was answered by Akshay Thakur, business development manager of the industries and IoT product group at Cisco

 

What electrical and data standards are applicable to a PoE lighting installations?

This question was answered by Akshay Thakur, business development manager of the industries and IoT product group at Cisco

 

With the power rating of LED luminaires growing, what approach needs to be taken to control voltage drop along network cables?

This question was answered by Akshay Thakur, business development manager of the industries and IoT product group at Cisco

 

Control

What is the difference between the presence and absence detection of an occupancy sensor?

Answered by: Mohammad Darwish - Head of solutions and controls at Fagerhult Middle East

 

Will halogen transformers and dimmers work with LED?

This question has been answered by Chris Shenton, technical and quality specialist at LEDvance UK

 

Lamps

Does a suitable retrofit lamp exist for G9 Halogen lamps?

Answered by: Adrian Kitching - managing director at Crompton Lamps

 

How can I use LED to light an art gallery?

Answered by  Thomas Holgeth, joint managing director of High Technology Lighting

 

I’ve seen MR16 LED retrofit lamps, are LED lamps also available to replace the smaller MR11 halogen lamps?

This question has been answered by Chris Shenton, technical and quality specialist at LEDvance UK

 

LED lamps and luminaires are commonly available in 2700K, 3000K and 4000K colour temperatures, but how do you go about choosing the correct colour?

This question has been answered by Chris Shenton, technical and quality specialist at LEDvance UK

 

Are LED replacements available for fluorescent tubes?

This question is answered by Chris Shenton, technical and quality specialist at LEDvance UK

 

Emergency Lighting 
 

What’s the recommended light output for an emergency fitting over its lifetime?

Answered by: Jonathan Bell - commercial director of Liteplan.

 

Can I ship lithium batteries by air? 

Answered by: Jonathan Bell - commercial director of Liteplan.

 

How is ‘stay put’ lighting triggered?

This question was answered by Alan Daniels, commercial director of P4 Fastel.

 

Do I need ‘stay put’ lighting in my premises?

This question was answered by Alan Daniels, commercial director of P4 Fastel.

 

What are the compliance rules for ‘stay put’ lighting?

This question was answered by Alan Daniels, commercial director of P4 Fastel.

 

Are lithium batteries safe for emergency lighting?

Answered by: Jonathan Bell - commercial director of Liteplan

 

Can an exit sign be in a warm white colour?

Answered by: Jonathan Bell - commercial director of Liteplan

 

Is it possible to convert a standard luminaire using a GLS tungsten lamp to emergency operation?

Answered by: Jonathan Bell - commercial director of Liteplan

 

Can a Power over Ethernet system support emergency lighting?

Answered by: Jonathan Bell - commercial director of Liteplan

 

What colour should the charge indicator on self-contained emergency lights be?

Answered by: Jonathan Bell - commercial director of Liteplan

 

Are Lithium Ion batteries suitable for emergency lighting?

Answered by: Jonathan Bell - commercial director of Liteplan

 

What's a simple way to convert GU10 and T8 fittings?

Answered by Jonathan Bell - commercial director of Liteplan

 

Why do EU emergency lights last for less time than in UK?

Answered by Jonathan Bell - commercial director of Liteplan 

 

Is there any legal requirement as to which emergency light fittings need to be maintained or non-maintained?

Answered by Jonathan Bell - commercial director of Liteplan 

 

Can dimmable LED downlights use emergency packs?

Answered by Jonathan Bell - commercial director of Liteplan 

 

What colour should the charge indicator on self-contained emergency lights be?

Answered by Jonathan Bell - commercial director of Liteplan 

 

How often should I change emergency lighting batteries?

This question has been answered by Jonathan Bell - commercial director of Liteplan 

 

Does the top deck of a car park need emergency lighting?

This question was answered by the Lux Team

 

Do I need emergency lighting?

This question was answered by John Bullock - Lux's applications editor

 

Light Science
 

When should custom optics become the standard choice?

This question has been answered by David Bates, divisional marketing manager of Carclo Optics.

 

Can a light fixture be effectively vibration-proof?

Answered by the Lux technical team.

 

How effective are UVC LEDs?

This question has been answered by the technical team at RayVio corporation.

 

Why does ‘glare factor’ matter?

This question has been answered by the technical team at Ansell Lighting.

 

What is the difference between footcandles and lux?

Answered by Bill Plageman - vice president of marketing and product management at Amerlux

 

What are MacAdam Ellipses and why are they important?

Answered by Thomas Holgeth - joint managing director of High Technology Lighting

 

Retail

Can I use any manufacturer's products on a lighting track?

Answered by Eric Riley, sales and marketing director of illuma Lighting

 

Why aren’t 3 circuit lighting tracks all the same?

This question was answered by Eric Riley - sales and marketing director at illuma lighting

 

How do I prepare a lighting specification for an international roll-out programme?

Answered by Gethyn Williams, Regional Director for EMEIA at Amerlux LLC

 

Hotels

How do you light a bathroom mirror?

This question was answered by the technical team at Astro Lighting Ltd.

 

How do I best control the budgets for my hotel projects?

Answered by Bill Plageman - vice president of marketing and product management at Amerlux LLC

 

Offices

What is the difference between edge-lit and backlit panels?

This question has been answered by the technical team at Integral

 

Lighting in practice

How do I find a trustworthy manufacturer?

Answered by Bill Plageman - vice president of marketing and product management at Amerlux LLC

 

How do I protect my design specification?

Answered by Bill Plageman - vice president of marketing and product management at Amerlux LLC

 

Lighting Law

What is ERP regulation and does it effect me?

This question has been answered by Chris Shenton, technical and quality specialist at LEDvance UK

 

Exterior

What are the things to avoid when specifying step lights?

This question was answered by Bill Plageman, VP of marketing at Amerlux.

 

What should I look for in post-top amenity lighting?

This question has been answered by Bill Plageman, VP of marketing at Amerlux.

 

Human-Centric

What is biodynamic lighting and should I use it?

This question has been answered by Jim Ashley-Down, managing director of Waldmann Lighting

 

Biodynamic, circadian, human-centric lighting – isn’t it all the same thing?

This question has been answered by Jim Ashley-Down, managing director of Waldmann Lighting

 

What do I need to know when planning a biodynamic lighting installation?

This question has been answered by Jim Ashley-Down, managing director of Waldmann Lighting

 

What effect does biodynamic lighting have on the human body?

This question has been answered by Jim Ashley-Down, managing director of Waldmann Lighting