ISP leds?

Candle Power Forums

Help Support Candle Power:

paulr

Flashaholic
Joined
Mar 29, 2003
Messages
10,832
What's the story with ISP leds these days? A CPFer who was selling them a while ago has since disappeared. Are there other sources? Are they really a lot less efficient than (say) Nichias? I'm particularly interested in the 5mm 100ma part. Supposedly it has a much more neutral white color than the typical blueish 5mm "white" leds.
 
Why don't you PM CPFer djp-in Singapore?

A few weeks ago he sent me a few of those 5mm 100mA superwhite ones. Even the ISP 40mA 5mm ones will pretty well spank any 5mm Nichia though....
 
paulr,

ISP seems still going well, but Harmony who used to supply the 8mm white decided to stop doing so.

You can get their information on their new web site http://www.powerleds.com/data/home.html for more product information.

I am neither their representative nor having any interest/benefit from their sales to cpfers. But as a same countryman, I have a good relationship with them. Besides, their products are good in my opinion (I use quite a lot) and they are good people to discuss, too.

The 5mm 100mA (single die) is having very white, whiter than 8mm, it looks slightly blueish and it makes many Luxeons look green by side. It has 20 degree beam angle, and I find it nice to use with little or no reflector.

5mm 40mA (2 dies) has slightly warmer tint, but evenly white to 55 degree beam angle. I wish this one is used in AAA.

In addition to their flagship 8mm 100mA (4 dies), they also have 8mm 150mA (single die). But they will only produce if the order quantity is big.

In terms of efficiency such as lumens/watt may be lower than Nichia, I read some posts about it. But I consider that comparison somewhat unfair, it is like comparing the power efficiency of a portable pocket radio and a mini compo at home. ISP led produce certain amount of even light which Nichia 5mm can't.

If you want to purchase, you may contact them directly from the web site. I remember reading a post by someone about the minimum order quantity. If so, I might be able to help (no promise, though).

-- dj
 
DJ,

I'm in for a group purchase if someone starts it expecially interested in the high power LEDS and the 8mm 150mA what's the minimum order quantity on these
 
I don't know the min order qty, but remember reading a post by another cpfer mentioning 500.

Apparetly they don't produce 8mm 150mA due to low demand at the moment, but promised to make if "I" request. But I feel it is fair to ask for at least 500.

Perhaps, if there is enough demand, a group buy can be arranged with the same price hchhon sold before $3.50/pc or lower in the pack of 10.

8mm 150mA is using the same die as 5mm 100mA, but with extra heatsinking asset, it can be driven to 150mA safely.

I praticularly like 8mm 150mA because it has 3.0-3.3V Vf compared to 8mm 100mA 3.3-3.6V. This lower vf gives me sufficient room to have constant current regulation through 90% charge of a single li-ion cell.

-- dj
 
Back
Top