Iíve noticed that there appears to be a wide variation regarding how hot some small, bright lights get after a few minutes of constant on runtime. Among my lights, here are some examples:
Peak Caribbean, pocket body: gets warm but not hot at all
KL4 on single 123 tube when using R123: gets hot as hell
HDS 60 on high: gets pretty warm, but short of too hot
Orb Raw: gets pretty warm but not hot at all
10 different 3W direct drive, single R123: mixed bag; some get hot as hell others just warm to warm plus
Iíve read many reports from CPF members that also suggest that there is a significant difference in heat buildup among similar lights. I realize my perception of warm vs. hot may be different than others; but, I donít think any differences here are enough to account for what I believe to be real and significant differences in how hot some small, bright lights get despite being the same lights and having the same components.
My question is; what can this apparent difference in heat buildup be mainly attributed to?