Just Curious...

[BigMac]

I have a Photon Microlight Rav'N, one of those ones that stobes between red, blue, and green. The batteries in it are almost dead. At first it just got dimmer, but then the blue and green leds went out. The red led is still going, just a bit dimmer. Does anyone know why? I was thinking mabey it was just last on the circuit or mabey red leds use less power. Thanks for any input.

 

[darkgear.com]

Yes you are correct. Your batteries are dying and the red uses the least amount of energy so it will still burn while the blue and green will not. This is true with the Eternalight Rave'n and zzz...lites also.

 

[BigMac]

So that means the most lights with red leds will generally have better runtimes. Thanks darkgear

 

[Wim Hertog]

Red leds have a much lower forward voltage (2.2V) than blue, green, white or other GaN leds (3.6V). The red needs less voltage, but the continuous forward current is 50 mA VS 30 mA for green,etc...
I think their power consumption on fresh batteries is the same.

 

[The_LED_Museum]

I'm pretty sure that all three LED chips receive about the same current with new batteries in lights like the Photon Rav'n and the (4 LED) EternaLight Raven & that EternaLight nightlight thing.

Darkgear is right - the green & blue chips need more voltage to fire off than red, orange, or yellow ones - so the blue & green will dim & eventually go out while the red one keeps working.

Change the batteries in your Rav'n and I bet it'll work as good as new again. /ubbthreads/images/graemlins/grin.gif