Warm White LED: 12 vac, 1 Watt, 107 Lumens (compares to 15 watt incandescent), 3200k +/- 10%
Cool White LED:12 vac, 1 Watt, 107 Lumens (compares to 15 watt incandescent), 6500k +/- 10%
These bulbs use over 70% less energy than the halogen bulbs they replace. That savings shows up as a major reduction of heat generated. So, you not only reduce your energy consumption for the lights, now your display cases will be much cooler. That also saves you on air conditioning.
