So when i try to use my DX <5mW (i know cheap right but) if i use it in my room which is pretty cold (like 40-60F) when i turn it on then it starts out very dim (like less than or equal to a cheapy $0.50 red) then as it warms up it gets as bright as always.. but if i just warm it in my hands then it starts out bright.. so my question is is this a regular problem with greens or just DX or just mine? like is there a certain operating temp for greens (or any color for that matter)?