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godspeed
11/24/2012, 09:29 PM
I am building a reef light system. I brought 5 10 watt cool white leds off ebay. I hooked them up in series what size driver would I need to power it?
souperman
11/24/2012, 09:41 PM
What is their rated forward voltage and max current?
godspeed
11/24/2012, 10:02 PM
Specifications:

1. Forward Voltage: 12V
2. Luminous flux: 800-900LM
3. Output power: 10W
4. Life time: 55,000 hours
5. Light Color: Cool White
6. View angle: 120
souperman
11/24/2012, 10:15 PM
So if you want a constant current driver it'd have to do about 1.5 amps and handle 60 volts.
godspeed
11/25/2012, 07:29 AM
So if you want a constant current driver it'd have to do about 1.5 amps and handle 60 volts.

ok than you
godspeed
11/25/2012, 07:37 AM
one more question, do they make those in a dimmable driver. I been searching. If so who have them?
godspeed
11/25/2012, 08:09 AM
This is what I found
http://www.ebay.com/itm/100W-Watts-High-Power-LED-Driver-Boost-Step-up-Topology-Garden-Street-Light-/160928217105?pt=LH_DefaultDomain_0&hash=item257811b811
mcgyvr
11/25/2012, 09:15 AM
To size a constant current driver for LED's you first take the # of LED's x Forward Voltage = 60V
Then take the wattage divided by the forward voltage of 1
So 10/12 = .83 Amps

So you need a driver that is rated for 60V output and .83 Amps max

The tough part is due to safety reasons 60V drivers (or anything over 48-54V) are much tougher to find.

Frankly I would suggest either getting 1 more LED and 2 drivers (like the meanwell LPF-40D-48).
So only 3 in a series string x 12V = 36V @.83 Amps
So make 2 fixtures with 3 LEDs and 1 driver each.

OR drop 1 LED and do 4 x in series with a meanwell HLN-40H-54B or similar
godspeed
11/26/2012, 12:53 AM
To size a constant current driver for LED's you first take the # of LED's x Forward Voltage = 60V
Then take the wattage divided by the forward voltage of 1
So 10/12 = .83 Amps

So you need a driver that is rated for 60V output and .83 Amps max

The tough part is due to safety reasons 60V drivers (or anything over 48-54V) are much tougher to find.

Frankly I would suggest either getting 1 more LED and 2 drivers (like the meanwell LPF-40D-48).
So only 3 in a series string x 12V = 36V @.83 Amps
So make 2 fixtures with 3 LEDs and 1 driver each.

OR drop 1 LED and do 4 x in series with a meanwell HLN-40H-54B or similar

So I cant go no higher than .83 amps?