I ordered a dw4 Hank light in e21a 2000k and 4500k. Looks to me like it is 2700k instead. I messaged Hank with the pictures below but he didn’t seem convinced. The light looks the exact same as my 2700k house lighting, not the orange that most pics of the 2000k. I don’t have another e21a to compare it to.
What do you think? Any ideas on how I can verify the color temp?
Edit - this is a dual channel light, pic is just the “2000k” light turned on
because it’s mixed with 4500K ?
2000k+4500k = 3250k.
With some CCT and tint variation, I could see the CCT being around 3000k when both are mixed.
Sorry I should have been more clear it is a dual channel. The pic is just of the “2000k” led turned on
do you have another 2700K flashlight
Nope closest I have is a few different 4000k lights.
I do have a few of those Phillips amber 2000k light bulbs and the dw4 is quite a bit cooler
I think you’re going to need more data.
Something marketed as the same color temp by 2 different manufacturers might not be the same. For example: one manufacturer might market an led as 4000K, when it is actually 4300K. Another might market their led as 4000K when it is actually 3800K. Plus there are variations in binning. Even among the same manufacturer, leds sold as 4000K are actually not exactly that temp. Instead they’re in a range around 4000K.
It could be the Phillips bulb you have is actually 1500K even though it was marketed as 2000K. Or it could be dw4’s leds are actually 2200K. A rough visual comparison between 2 bulbs isn’t enough.
Also, color temperature of leds tends to change depending on how much power you feed an led. At lower power settings color temperature is usually lower. Maybe your Phillips bulbs feeds very low power to its leds compared to your DW4.
I think to determine whether your leds are actually 2700K, you’re going to need something like an Opple to actually measure the color temperature so you can send him a screenshot of the readout.
Tried a few different lights with a random color temp app. Not calibrated but spot on with the lights of known temp
Says the “2000k” is 2800k which is what it looks like to me.
Also says my Phillips amber is 2100k and normal light bulbs are 2700k.
Anyone have an e21a in 2000k and a Philips amber Edison bulb you could compare with?
Maybe try downloading a few random color temperature apps and taking screenshots of their readouts then emailing those to Hank.
A DUV neutral 2000k can look much whiter than a positive DUV amber light.
I did just that and sent it to Hank, will see what he says.
Edit- Hank is sending another head
Exactly this.
Typical Led house bulbs have positive duv, so a 2700k positive DUV bulb will come out looking yellower and hence warmer. Nichia e21a will likely have negative DUV, making it look cooler. Likely why the two look the same.
yay!
I totally agree with your CCT measurements and observations that the LED you received is not 2000K. And you did an excellent job of testing. Great photos too.
Thanks!
