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<p>[QUOTE=&quot;John Burgess, post: 4917959, member: 105098&quot;]I am familiar with the differences between incandescent and halogen.</p><p>Halogen uses halogen gas in a contained space inside the bulb with the tungsten filament, the halogen causes the tungsten soot that is produced when the filament is electrically heated to redeposit back onto the filament instead of on the inside glass, like the incandescent bulb does which uses argon gas or a couple other gasses inside the bulb depending on manufacture. So the halogen bulb stays brighter longer, and lasts longer because the tungsten soot keeps getting deposited on the filament also why halogen burns hotter, because it needs to to keep recycling the tungsten soot.</p><p>&nbsp; </p><p>there&#039;s a couple factors here though, the incandescent bulb does generate soot on the inside of the glass, this soot softens the light further towards natural light as the bulb is used and &quot;broken in&quot;. this doesn&#039;t happen on a halogen lightbulb, so even a 2700K Incandescent or &quot;warm white&quot; bulb will not have the same color output or color renditioning as a halogen 2700K &quot;warm white&quot; bulb although they both should have the same exact light color.</p><p><br /></p><p>then there&#039;s CRI, the ability of a light source to accurately reproduce colors and is measured on a scale from 0 to 100&nbsp; with natural light being 100.</p><p>CRI should be as high as you can get it to as close to natural light, but in either case most bulbs, incandescent or halogen top out in the 80s to low 90s, BUT generally incandescent bulbs have a higher CRI than halogen once they are &quot;broken in&quot;, rising up from a CRI of 93 and nearing 100 before it burns out, while with a halogen the CRI is what you get the entire time, 80-83-85, hard to find one over 90 or a 93, but it is what it is, it doesn&#039;t get &quot;sweeter&quot; as it&#039;s used.</p><p><br /></p><p>fluorescent, led are the worst, xenon, MH, HPS, LPS,all have poor color rendition or CRI, but I really do like the newer narrow band amber LEDs they are using for outdoor lighting nowadays, these have potential to replace incandescent I think.</p><p><br /></p><p>You can get close with Halogen, but it&#039;s not the same CRI and never will be compared to incandescent bulbs that have an hour or more burn on them.</p><p><br /></p><p>A halogen 2700K with a 60 watt equivalent SHOULD be comparable, but the color rendition of the light isn&#039;t. f the CRI or color accuracy is lets say 83, well a fluorescent light has a CRI of 80.</p><p>&nbsp;</p><p>As an aside, my neighbor has two different kelvin LED porch lights, it is annoying as all get out to see it every day, one is blue the other is yellow!</p><p><br /></p><p>I haven&#039;t seen anything on lighting comparisons here, the pros/cons of halogen or LED, CFLs so maybe it&#039;s an older topic but I&#039;d be interested to read the opinion so I may just go looking for them! Thanks.</p><p><br /></p><p>Oh and one more thing, I had read that the GE &quot;reveal&quot; line of halogen lightbulbs had a CRI of 100..... don&#039;t know if that&#039;s true, I don&#039;t find it on GE documents, just reseller websites, but the kelvin is a little high for the 60 watt equivalent at 3000K, but otherwise this should have &quot;natural light&quot; color rendition. Wondering if anyone is using these bulbs for coin grading or viewing in a desk lamp?[/QUOTE]</p><p><br /></p>

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