Does LED desk lamp cause eye fatigue?

Does LED desk lamp cause eye fatigue in prolong use for 2hrs? I am refering to 3watt pure white light with minimal blueish tint.

http://www.led-flashlight.ca/produc...terior-L-E-D--Desk-Lamp-w--Flexible-Neck.html

I think it might depend on the beam pattern. A nice diffused, even beam would be ok not a central hot spot IMHO.

Safey first. There is enough power in a household circuit to start a fire if a short/near short circuit occurs. I do not see a UL listing claim. AAA batteries will give 2 hours of max brightness.
Tint. LED unknown. LED could be Lumileds Luxeon (OK), Nichia Jupiter (no), Osram Golden Dragon (unknown) or Cree 9070 (unknown) Coast is a German company. I find colour temperature above 5500K puts a strain on my eyes.
Brightness low. Current 1.3W LED gives 25-30 lumens out the front. IKEA desklamp with compact flouresent produces 150 lumens. Ikea compact flouresent 7 watt bulb produces 280 lumens. 9W spiral compact flouresent produces over 400 lumens.

Osram sylvania is supposed to release an LED desk lamp in Canada before Xmas.
http://store.sylvania.com/show_item.cfm?i=72111

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I did not buy LED desklamps as such, just bulbsto put in regular lamps.
i got most of my bulbs from
http://www.superbrightleds.com/edison.html

Model E27-W24 Narrow Angle - View angle too narrow. Purplish tint to beam very annoying. Gave away.

Model E27-W24 Wide Angle - View angle too wide >> dim. High colour temp irritating. Gave away.

Model E27-W50 - I had the W48. Body made of thick glass >> too heavy >>gooseneck lamp keeps drooping. High colour temp irritating. Half the LEDs blacked out after 1 year of use (2-4 hours per night). Thrown away.

Model PAR20-x36 - 1 watt Luxenns. The tint of both the cool & warm white pleasing. Tiny bit of a hotspot in the warm white annoying when reading. Warm white dimmer than cool white. Almost but not quite bright enough for me (I got bad eyes). I suspect the coast lamp is about this light level. In storage.

Model PAR20-x36 - UL listed. Bright enough to be useful. Cool white has nice tint. Warm white has a slight green tint and is dimmer. Cool white in gooseneck lamp clamped to headboard of my bed. Warm white my keyboard light

Superbrightleds has a $25 minimum order for international customers.

I also have the warm white version of this bulb. Good tint. Too brite for a nite lite. Too dim for useful work. In storage.
http://www.eliteled.com/products/lightbulbs/e26baselightbulb.html

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The new miniture spiral (as opposed to the spiral) 9 & 13 W compact flouresents are much smaller and does not poke out past the pampshade of desk lamps. Ditto the IKEA 4 &7W.

I think it may cause eye strain from being too dim.

I think even those neutral white leds have much more blue in the beam than a typical incan or fluorescent light does. Why do you want to use leds for a desk lamp? You can get good full-spectrum fluorescents that are comparably efficient and long-lasting.

I think it depends on your eyes. I think we discovered that bluish colors help with near sided people, where as if you are far sided it will make things blurier.

I have a 19 led bulb I use in a screw in lamp at home, a 55watt halogen lamp I used on my wheelchair at school when I was in college and a wheelchair and before that, an led head lamp.

Before I got my eye sight back, I used a blue inova x5 for reading fine print, but it would give a head ache. I had a few folks use the inova light for spot reading. A few in rehab who used similar led reading lights for reading and the owl light.