Cruisers Forum
 


Join CruisersForum Today

Reply
 
Thread Tools Rate Thread Display Modes
Old 20-02-2010, 17:12   #1
Registered User
 
Christian Van H's Avatar

Join Date: Oct 2008
Location: Princeton, NJ
Boat: Challenger Anacapa 42
Posts: 2,097
Images: 57
LED Bulb Mini Review...

Hi all! I wanted to post this mini review of some LED bulbs I recently found at...HOME DEPOT!!! They are the new Philips MR16 replacement bulbs, and they seem to be AWESOME! We have 10 reading spot fixtures onboard, each with a 20 watt halogen bulb. These halogen bulbs draw 1.45 amps ea. @ 13.8 VDC and throw off quite a bit of heat. I just picked up 2 new Philips LEDs; one spot bulb (10 deg), and one flood (25 deg), each 4 watt or .29 amps @ 13.8 VDC...all while staying cool. OK, here's the bad news: the LED spot is $19.95 at Home Depot and carries a 5 year warranty. The flood is $29.95 and carries a 6 year warranty! Both spot and flood are offered in warm or cool color temps. I chose warm. Check out the pics below. First the shelf at home Depot. Second, a pic of the flood in packaging. Third find the flood, spot and a regular halogen from left to right. Last find the light patterns they throw from 36" out. 20 watt halogen on the left, spot in middle, and flood on right. I'm going with the warm flood bulbs. If I can find an overhead fixture the uses the MR16 bulb, I would use them throughout the boat. I may even marry them...
Attached Thumbnails
Click image for larger version

Name:	IMG_6032.JPG
Views:	124
Size:	64.6 KB
ID:	13393   Click image for larger version

Name:	IMG_6040.JPG
Views:	113
Size:	67.9 KB
ID:	13394  

Click image for larger version

Name:	IMG_6053.JPG
Views:	116
Size:	60.2 KB
ID:	13395   Click image for larger version

Name:	IMG_6041.JPG
Views:	137
Size:	30.0 KB
ID:	13396  

__________________

__________________
www.anacapas.com

Here's to swimmin' with bowlegged women!
Christian Van H is offline   Reply With Quote
Old 20-02-2010, 19:17   #2
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
So and so many Watts, but how many lumens?

I use the newer type fluorescents (Philips) and yet to find a LED that beats the fluo on output and temperature.

So, how many lumens per Watt?

LEDs here 8USD per 1.6W (cool white), or 15USD per 3W (cool white).

b.
__________________

__________________
barnakiel is offline   Reply With Quote
Old 20-02-2010, 19:30   #3
Registered User
 
Christian Van H's Avatar

Join Date: Oct 2008
Location: Princeton, NJ
Boat: Challenger Anacapa 42
Posts: 2,097
Images: 57
Lumens: 130. Lumens per watt: 32 We both found that the light output was wonderful for reading...I was really surprised by the output.
__________________
www.anacapas.com

Here's to swimmin' with bowlegged women!
Christian Van H is offline   Reply With Quote
Old 21-02-2010, 09:52   #4
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
Now you are talking! THX

I think the modern fluo from Philips are at not less than 60 and the 12 Volt Steca claims 46-50 lumens per Watt. Warm white light, very pleasant.

Again, 40-60% more power efficient.

So, it looks like we have at least two great alternatives for incandescent and the old fluo!

Now we have 220 Volt fluos via a small inverter, but I would love to try the 12 Volt from Steca - just not very sure how they stand up against the Voltage fluctuations in 10-15 Volt ???

b.
__________________
barnakiel is offline   Reply With Quote
Old 21-02-2010, 20:36   #5
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,379
Hi Christian,

Went by Home Depot to check out the bulbs and the package says they are rated at 12V AC. So what kind of power are you feeding them and what kind of fixture or where did you get the fixture? Will they run on 12V DC?

Skip
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 21-02-2010, 21:01   #6
Registered User
 
Christian Van H's Avatar

Join Date: Oct 2008
Location: Princeton, NJ
Boat: Challenger Anacapa 42
Posts: 2,097
Images: 57
Hi Skip! None of my packages, and none of Philips online descriptions say AC or DC...they all just list 12 volts. The pictures were taken while the lamps were running off a 13.8 volt DC power supply...
__________________
www.anacapas.com

Here's to swimmin' with bowlegged women!
Christian Van H is offline   Reply With Quote
Old 21-02-2010, 21:36   #7
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,379
Hi Christian,

Well you are correct. The package only said 12V on the outside and I didn't cut it open. I did find a spec sheet online at https://www.bulbwizards.com/v/vspfil...es/ew%20mr.pdf that said the bulbs are compatible with 12V AC transformers. Also spoke to the lighting guy at the local HD who I have met a few times and learned he is a retired EE and actually knows quite a bit about the lights and circuits. He said the standard fixtures for these lights are AC which made sense to me. Otherwise it would require a transformer and rectifier circuit to power them.

BUT, if you have them working on DC then that's all that counts. Think I'll pick one up to play with.

Thanks
Skip
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 21-02-2010, 21:42   #8
Registered User
 
Christian Van H's Avatar

Join Date: Oct 2008
Location: Princeton, NJ
Boat: Challenger Anacapa 42
Posts: 2,097
Images: 57
The PDF isnt quite the same bulbs, but the low voltage AC stuff makes sense. I have seen several similar bulbs from different manufacturers listed as AC/DC...but who knows, maybe they wont last as long running on DC. Maybe I should email the manufacturer...
__________________
www.anacapas.com

Here's to swimmin' with bowlegged women!
Christian Van H is offline   Reply With Quote
Old 21-02-2010, 21:54   #9
Senior Cruiser
 
skipmac's Avatar

Cruisers Forum Supporter

Join Date: Oct 2007
Location: 29 49.16 N 82 25.82 W
Boat: Pearson 422
Posts: 12,379
Well since an LED is a diode if you feed it AC I assume it will pass only one half of the cycle just like a regular diode. So it would be passing a pulsating DC current unless there is a rectifier somewhere, either in the bulb or the power system. If it is designed for 12V AC but works on 12V DC it might actually last longer on stable DC power.

You know, emailing Phillips might not be a bad idea. Keep us posted.

Skip
__________________
The water is always bluer on the other side of the ocean.
skipmac is online now   Reply With Quote
Old 21-02-2010, 22:01   #10
Senior Cruiser
 
senormechanico's Avatar

Cruisers Forum Supporter

Join Date: Aug 2003
Boat: Dragonfly 1000 trimaran
Posts: 5,827
Recently, I cut up a Christmas light string of LED's. They were rated at 0.02 amps @ 120 VAC.
I rewired about half of them to run off a laptop computer power supply which put out 18 volts DC because I wanted them to back light something outdoors. They're drawing the same 0.02 amps through each of 4 parallel strings and doing just fine.
__________________
Memento,homo, quia pulvis es, et in pulverem reverteris.
senormechanico is offline   Reply With Quote
Old 22-02-2010, 00:27   #11
Moderator
 
noelex 77's Avatar

Cruisers Forum Supporter

Join Date: Jul 2007
Location: Living on dirt waiting for our new yacht to be built.
Boat: Half built Bestevaer.
Posts: 10,619
Quote:
Originally Posted by barnakiel View Post
Now you are talking! THX

I think the modern fluo from Philips are at not less than 60 and the 12 Volt Steca claims 46-50 lumens per Watt. Warm white light, very pleasant.

Again, 40-60% more power efficient.

So, it looks like we have at least two great alternatives for incandescent and the old fluo!

Now we have 220 Volt fluos via a small inverter, but I would love to try the 12 Volt from Steca - just not very sure how they stand up against the Voltage fluctuations in 10-15 Volt ???

b.
You need to compare apples to apples with efficiency ratings. The lumen per watt rating for the LED is the amount of light coming out of the fitting. For the compact fluro it is the amount of light the globe produces. If you mount this globe in a light fitting and measure the amount of light produced it will be less. For the 220v model you also have to allow for the efficiency losses in converting the voltage
__________________
noelex 77 is offline   Reply With Quote
Old 22-02-2010, 07:36   #12
Moderator Emeritus
 
GordMay's Avatar

Join Date: Mar 2003
Location: Thunder Bay, Ontario - 48-29N x 89-20W
Boat: (Cruiser Living On Dirt)
Posts: 31,580
Images: 240
Quote:
Originally Posted by noelex 77 View Post
You need to compare apples to apples with efficiency ratings. The lumen per watt rating for the LED is the amount of light coming out of the fitting...
Any legitimate manufacturer of quality LED lighting assemblies should be able to provide a Photometric Test Report.

* A photometric report is a set of printed data describing the light distribution, efficiency, and zonal lumen output of a luminaire (fixture & lamp).

Photometric Measurements of Solid-State Lighting Products
IES #LM-79-08 Unable to set browser cookie

See also ➥ http://apps1.eere.energy.gov/buildin...y2_grather.pdf
__________________
Gord May
"If you didn't have the time or money to do it right in the first place, when will you get the time/$ to fix it?"



GordMay is offline   Reply With Quote
Old 22-02-2010, 07:51   #13
Senior Cruiser

Cruisers Forum Supporter

Join Date: Aug 2009
Location: between the devil and the deep blue sea
Boat: a sailing boat
Posts: 17,314
That's correct, the 220/110V version requires an inverter (but the 220/110V version is better than twice the LED's efficiency too).

But the 12V from Steca is a 12 DC, no loss, and still way more lumen/Watt efficient (I do not mean better, because there are all other factors as mentioned by Noelex).

(Yes, yes, I know it all belongs to a separate thread and I might be distracting - apologies to all!)

b.
__________________
barnakiel is offline   Reply With Quote
Old 22-02-2010, 08:26   #14
Senior Cruiser
 
Captain Bill's Avatar

Cruisers Forum Supporter

Join Date: Apr 2008
Location: On the boat
Boat: Endeavourcat Sailcat 44
Posts: 2,313
Thanks for the heads up on these fixtures. I'm in need of a couple to replace some reading lamps in my rear cabins. The only concern I might have running them on straight DC is that when running on AC the LED's are actually unpowered more than 50% of the time where as on continious DC they are conducting 100% of the time. When they are conducting they generate heat and on DC they will be generating more heat, which the fixures may not be designed to dissipate. The price however makes them worth a try.
__________________
Captain Bill is offline   Reply With Quote
Old 22-02-2010, 08:54   #15
Registered User

Join Date: Mar 2007
Boat: Privilege 482
Posts: 363
I thought one of the issues with using LEDs intended for home use on a boat was the fact that LEDs are very sensitive to voltage highs/drops and that unless you have some circuitry that insures they are fed a constant voltage, the varying voltage from your battery bank can cause them to fail? Obviously this is not an issue for home use as your power source is pretty stable. Anyone have thoughts on this?
__________________

__________________
teneicm is offline   Reply With Quote
Reply

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
380: Lagoon 380 User Review (15,500 Mile Review) 3Eagles Lagoon Catamarans 23 28-02-2013 18:25
380 S2: Lagoon 380S2 Mini-Review Redbull addict Lagoon Catamarans 30 30-11-2010 15:40
LED Bulb Review / Comparison ! Maine Sail Product or Service Reviews & Evaluations 47 02-07-2010 07:02
Sailor's Solutions' ZED01 Mini Warm Light LED GeoPowers Product or Service Reviews & Evaluations 6 13-02-2010 03:53
Cat with bulb bow entry Therapy Multihull Sailboats 14 26-07-2007 15:01



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 22:29.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.