De puts out more heat than se?

[TreeFiddy350]

I would think a de hps bulb would put out more heat than a se hps bulb, right?
Does anybody know an approximate temp for each type of bulb output?

 

[Lucky Luke]

I would imagine it would put out a little more heat.
If u are running a 600wDE HPS then the heat from the watts would be the same as a SE. A watt of energy produces a watt of heat. The extra heat would come from the gasses in the extra filament.
Thats my take on it but be aware its not something ive researched and im not a sparky or science guy.

 

[Renfro]

Well the DE's put out 20 - 25% more light than a SE and that includes infrared so yes the DE's run hotter.

 

[Renfro]

Just a little more thoughts on the lighting / heat issue.

Infrared light heats up surfaces that it hits. So it impacts leaf surface temperatures greatly. LED generally lacks infrared spectrum and therefore the environment must be run warmer to get the leaf surface temperatures up to optimal.

HPS has more infrared than CMH and thats probably a big part of why people say CMH runs cooler than HPS.

When dealing with totally different lamps like CMH and HPS there is an inherent difference in the percentage of input power that is converted to heat in the arc tube. Some percentage of energy is converted into light and some into heat. A CMH is more efficient and more of the energy is converted into light when compared to the HPS. So combine those two factors, infrared and efficiency you can easily explain why people observe CMH running cooler than HPS watt for watt.

 

[Kingrow1]

I almost rep+ you for that.

Lets clarify that light is a wave just like uv and infared so its not just infared that passes untouched trough air and heats a surface but all light. Observe how a laser works.

Your getting it though.

Consider that a plant can handle a shit ton of light and infared and why transpiration is such an efficient cooler. Ramping up temps does in no way substitute for lack of infared with led and that is broscie.ce - it will warm the air meaning a leaf cant pass as much heat into it which isnt great.

Just a little more thoughts on the lighting / heat issue.

Infrared light heats up surfaces that it hits. So it impacts leaf surface temperatures greatly. LED generally lacks infrared spectrum and therefore the environment must be run warmer to get the leaf surface temperatures up to optimal.

HPS has more infrared than CMH and thats probably a big part of why people say CMH runs cooler than HPS.

When dealing with totally different lamps like CMH and HPS there is an inherent difference in the percentage of input power that is converted to heat in the arc tube. Some percentage of energy is converted into light and some into heat. A CMH is more efficient and more of the energy is converted into light when compared to the HPS. So combine those two factors, infrared and efficiency you can easily explain why people observe CMH running cooler than HPS watt for watt.

 

[TreeFiddy350]

Thanks guys! This may be a stupid question, but if mirrors are added in the grow environment, do you think it’s possible to get more light from a single light source?

 

[Kingrow1]

Thanks guys! This may be a stupid question, but if mirrors are added in the grow environment, do you think it’s possible to get more light from a single light source?

There is many a thread explaning why but just rest assured mirrors are not used in growing and reflective mylar or flat matt paint will do a much better job.

You can however create a cool enter the dragon scene and will look like you have a gazillion plants not just a few

 

[Kingrow1]

And before someone says tinfoil - fuck that shot off too its no use to us

 

[TreeFiddy350]

That was a high thought for sure lol just wanted to double check