[SIZE=+1]Vinh,
I just wanted to tell you how happy I am with your D4Svn2. It's everything you claimed, and then some. In terms of focus and brilliance it truly blows away all my other D4S's, including: SST-20 5000K, SST-20 6500K, XP-L HI 6500K, and XP-L HI 5000K. I see those as exceptional general purpose lights, and the vn version as a very impressive reach-out-and-touch spotlight. It has minimal surround at lower levels, but improved at higher levels. In terms of lumens, ceiling bounce tests with fresh Schockli 5700s give the vn[/SIZE][SIZE=+1][SIZE=+1] a small but observable edge over the 5000Ls, and uncertain[/SIZE] results with the 6500Ls, necessitating instrumented measurements for accuracy. I see the "regular" D4S and the D4Svn as two different lights with different strengths and purposes.
You may use these comments if you find them appropriate.
Sincerely,
Brightnorm[/SIZE]