DIY-HP-LED
Well-Known Member
110 Volt AC Driverless COB Lamp Test Update
I took some temperature readings off the AC COB lamp today, it was running steady on a veg plant since I put it on test and the heatsink temp was 45 C. I have a .22 amp 120mm fan cooling it, but could upgrade to a .30 amp fan and cover the tops of the heatsink with plastic to better direct airflow, this should bring the lamp down to the 40 C range. The vendors claim an efficacy of 100 - 120 lumens/watt with a CRI of 80, but I dunno how much credence to give to that. I didn't test the power consumption of each COB, but tutaj5 (using the 220V version) further up in the thread, says the 50 watt AC COBs draw 65 watts, which would explain where the 50 extra watts are going in my 3 COB lamp, even though it runs at 110 volts.
I took some temperature readings off the AC COB lamp today, it was running steady on a veg plant since I put it on test and the heatsink temp was 45 C. I have a .22 amp 120mm fan cooling it, but could upgrade to a .30 amp fan and cover the tops of the heatsink with plastic to better direct airflow, this should bring the lamp down to the 40 C range. The vendors claim an efficacy of 100 - 120 lumens/watt with a CRI of 80, but I dunno how much credence to give to that. I didn't test the power consumption of each COB, but tutaj5 (using the 220V version) further up in the thread, says the 50 watt AC COBs draw 65 watts, which would explain where the 50 extra watts are going in my 3 COB lamp, even though it runs at 110 volts.
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