Rude Nora 3

monkey proofed

... rude

Nora 3 Performance

Nora 3 can be configured to individual requirement, providing a range of practical light settings to meet the needs of the caver. From 1-9 light settings can be specified, and the level of light provided by each setting can be configured to individual preference. The spot and flood LEDs can be operated separately or blended together. Each LED can be operated at low, medium, medium plus, high and maximum, offering a choice from 26 possible light combinations. See table below.

	Spot LED
Flood LED	off	low	medium	medium +	high	maximum
moon mode	8 lumen 2+ weeks	-	-	-	-	-
off	-	50 lumen 60 hrs	150 lumen 20 hrs	250 lumen 12 hrs	675 lumen 4 hrs	1000 lumen 2.25 hrs (2)
low	50 lumen 60 hrs	100 lumen 30 hrs	200 lumen 15 hrs	300 lumen 10 hrs	725 lumen 3.5 hrs	-
medium	150 lumen 20 hrs (1)	200 lumen 15 hrs	300 lumen 10 hrs	400 lumen 7.5 hrs	825 lumen 3 hrs	-
medium +	250 lumen 12 hrs	300 lumen 10 hrs (3)	400 lumen 7.5 hrs	500 lumen 6 hrs	925 lumen 2.5 hrs	-
high	675 lumen 4 hrs	725 lumen 3.5 hrs	825 lumen 3 hrs	925 lumen 2.5 hrs	1350 lumen 2 hrs (4)	-
maximum	1000 lumen 2.25 hrs	-	-	-	-	-

Default lamp settings 1-4 shown. (Typical output at 85 degC operating temperature)

Moon mode setting operates at maximum of 8 lumen and can provide estimated 2+ weeks of light, well suited to underground camping, small grovelling passage or a long dull prusik.

Nora 3 has effectively zero battery consumption when switched off, so there is no particular requirement to disconnect batteries. However it is always best practice to do so when not in use for more than a few days, at least if using li-ion batteries with low remaining charge.

Nora 3 operates from a wide range of batteries, including non-proprietary battery packs, individual 18650 cells, and AA batteries. For the purposes of lamp performance, typical light output and run times are based on our non proprietary 2p 6800mAh battery packs. Typical light output figures are given at 85 degC, a realistic operating temperature, particularly for higher light settings at which the LEDs produce significant heat. Run times for other 3.7v li-ion battery arrangements (of known capacity) can be approximated proportionally. Further information regarding performance using AA batteries

In order to ensure best possible performance, Nora 3 incorporates efficient current regulation circuitry using the latest Cree XP-L2 LEDs. The XLamp® XP-L2 LED is the first commercially available single-die LED to deliver breakthrough efficiency of up to 200 Lumen per Watt (at 350 mA operating current). LED efficiency is significant for caving lights as it effectively maximises achievable run times and performance, not least significantly at the more practical go to light levels typically employed by the well crafted caver.

Although less significant than a few years ago, due to step improvements in LED technology, heat sinking and thermal management is still an important aspect of any high output light. The efficiency of LEDs reduces when operating at increased temperature, and also at high output, i.e. they will be less bright per watt of energy used. Nora 3 features considered thermal and low battery charge management, in order to optimise performance of the lamp, and maximise life of both the LEDs and batteries. Even at highest output settings, the LEDs run well below their maximum manufacturer 3 Amp limit, a level at which they are painfully inefficient anyway.