Jump to content

DONT STAY LURKING AS A GUEST,

JOIN TEF AND BENEFIT FROM MEMBERSHIP:

CLICK HERE TO JOIN.
  • 0
kevin worrall

metal halide replacement

Question

kevin worrall

hi, I'm thinking of replacing 10off 400w metal halide units in our warehouse with led lamps.  I don't know too much about led's, its all new tech to me, can I get retrofit lamps to use? 

do they need control gear or just a power supply?, if just power, can I gut the old fitting to save time/money or have I got to reply the entire fitting?

any help would be appreciated 

 

Share this post


Link to post
Share on other sites

11 answers to this question

Recommended Posts

  • 0
Andy™
Just now, kevin worrall said:

hi, I'm thinking of replacing 10off 400w metal halide units in our warehouse with led lamps.  I don't know too much about led's, its all new tech to me, can I get retrofit lamps to use? 

do they need control gear or just a power supply?, if just power, can I gut the old fitting to save time/money or have I got to reply the entire fitting?

any help would be appreciated 

 

 

metal halide lighting is already very efficient, more so that fluorescent

 

you often need to bypass the ballast / ignitor with the replacement lamps although i think some will just screw in with no modifications

 

also, they do use less wattage but the lumen output is also less. things will have improved a bit by now, but the other year ago I look at something similar at a factory. basically, it was going to cost a lot of money, the total power used was going to be about 3/4 of what it was now but they were only going to get a bit over half the lumens...  decided to stick with the metal halide

 

 

Share this post


Link to post
Share on other sites
  • 0
kevin worrall

thanks Andy. The last time I replaced the lamps was only just over a year ago and I've got 6/10 still working. With having to hire a mobile platform its an expensive job to keep doing, so I was looking for something long lasting, therefore the led option 

Share this post


Link to post
Share on other sites
  • 0
Lurch

I fitted some random lights the other year and ended up sticking a 150W metal halide and a 50W LED flood on a pole. Light output was largely the same (outdoor on a ménage). Might be useful, might be rambling from a tired man. Got some non-working metal halides to attend to later this week so probably just swap them for LED again. It's more about reliability than anything, power savings aren't great as has been mentioned and the MH lights output a decent white light but assuming you fit decent LEDs there's less maintenance.

Edited by Lurch

Share this post


Link to post
Share on other sites
  • 0
Doc Hudson

Do you know the spec of the existing lamps re' the Lumen's and Kelvin?  i.e. the light output and the colour intensity?  Remember the Watts is just the power consumed. If you are looking at replacements do a direct comparison with the actual light levels not power consumption. I am not convinced that all LED manufactures quote accurate comparisons when they just refer to the Watts. and just saying 'warm' or 'cool' is a bit vague IMHO. If you don't have any accurate specifications for your existing lamps, but you have access to a light meter, it could be worth measuring the light levels under a sample of your lights and noting the height of the light fittings. Then working backward through a few light calculations we could recommend a minimum spec of light you need to be looking at.

 

Doc H.

Share this post


Link to post
Share on other sites
  • 0
Rob.

Usually a decent wholesaler would send a rep to spec out what your best options are. 

 

You're under no obligation to use them, but can use the information gained.

Share this post


Link to post
Share on other sites
  • 0
kevin worrall

gents, this is all the information I've got on the lamps and where they are used

its two rows of 5 fittings , 30m long and 6m high, 10m wide

the MH lamps are 400w and I'm after general lighting levels as its a warehouse

hope this helps

New file 1.jpg

New file (2).jpg

Share this post


Link to post
Share on other sites
  • 0
Lurch

TBF you shouldn't need to be replacing lamps every 12 months, or rather they shouldn't be failing so often. I've seen some compact fluorescent low bay replacements that work well too and have been on every day for several years, but then I could also find plenty of sites with low bays that are on daily that last years too so maybe you need to look at why yours are failing so often?

Share this post


Link to post
Share on other sites
  • 0
Evans Electric

Are you getting cheapo MH lamps from somewhere  Kevin ....  as Lurch says ,  quite a high failure rate. 

Share this post


Link to post
Share on other sites
  • 0
Andy™

are you using the correct rating lamps too, i.e not using a 250w lamp into a 400w fitting? although id expect this to last a much shorter time if it was

Share this post


Link to post
Share on other sites
  • 0
Evans Electric

Are they on permanently  , 24/7  ?     I'm trying to remember but I'm sure they recommend switching off for 15 mins  in any week to maintain lamp life .    

Share this post


Link to post
Share on other sites
  • 0
kevin worrall

gents, the lamps are on 10 hours a day 5 days a week. The fittings are quite old so it could be component failure. The lamps may be cheap, just asked for 400w MH from the wholesaler, didn't specify a brand as such and yes the fittings are 400w

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



FORUM SPONSORS

Electrical Test Equipment
Test Meter Calibration
Manufacturers
Electrical & Tool Suppliers
Electrical Software
Green & Renewables
Label Supplies
Accounting Software
Education & Training
Motoring
To Advertise and become a Forum Sponsor of

talk.electricianforum.co.uk, please

contact the Administrator

Here Thank You.




×