The wafer plate is built into the metal case and can dissipate heat better than flangeless lamps. I tested this lamp at 12.2 VDC (current draw 167 mA) and 23.91 VDC (current draw 87 mA). In both cases we are dealing with a 2W incandescent lamp which can at best produce 230 lumens, which is equivalent to a 20W halogen lamp. I compared this lamp (18 LEDs 2835) with a 3W lamp (12 LEDs 5630) of 300 lumens and 25W halogen equivalent and the lamp I bought is less bright. Delivered fairly quickly (11 days) from China. Conclusion: Yes, I recommend this warm white LED lamp as a replacement for a 15-20W halogen lamp.
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