Ultratac A1 on Amazon. AA or 14500 600 lumen tail clicky. $11.95

According to 264's BLF review, the Sofirn SF14 has, "No pulse width modulation. White color beam tint. No purple-blue-green hue". To me, the SF14 output apears to has about a 5500 color temperature with no noticeable blue or green tint. But I may not be sensitive to these aberrations and they go unnoticed. Nevertheless, they are not an issue for me. Let us know what you settle on. Thanks.