Should I remove the glass from my reflectors?

Helmut79

Helmut79

Well-Known Member
I have air cooled reflectors, but I haven't had a need to duct them, so the glass is just sitting there mounted to reflector, but now I got told by a growshop guy that this glass reduces effectiveness by roughly 20%.

Could there be some truth to what he said?
 
vostok

vostok

Well-Known Member
heat treated tempered glass ...I agree, if not used remove

unless they are Metal Halides

Mh have a habit of blowing and spraying glass all over

so are needed by most laws and students of common cents

good luck
 
Bareback

Bareback

Well-Known Member
Helmut79 said:
I have air cooled reflectors, but I haven't had a need to duct them, so the glass is just sitting there mounted to reflector, but now I got told by a growshop guy that this glass reduces effectiveness by roughly 20%.

Could there be some truth to what he said?
Click to expand...
I have a vented hood and I'm a paranoid about exploding bulbs so I keep the glass clean. I think the biggest dangers are at start up and when spraying anything on the plants.
 
vostok

vostok

Well-Known Member
from wiki:
...there are measures that can be taken to reduce the damage caused by a lamp failure violently:

  • Ensuring that the fixture includes a piece of strengthened glass or polymeric materials between the lamp and the area it is illuminating. This can be incorporated into the bowl or lens assembly of the fixture.
  • Using lamps that have a reinforced glass shield around the arc tube to absorb the impact of flying arc tube debris, preventing it from shattering the outer bulb. Such lamps are safe to use in 'open' fixtures. These lamps carry an "O" designation on the packaging reflective of American National Standards Institute (ANSI) standards.
Lamps that require an enclosed fixture are rated "/E". Lamps that do not require an enclosed fixture are rated "/O" (for open). Sockets for "/O" rated fixtures are deeper. "/E" rated bulbs flare at the base, preventing them from fully screwing into a "/O" socket. "/O" bulbs are narrow at the base allowing them to fully screw in. "/O" bulbs will also fit in an "/E" fixture.

(https://en.wikipedia.org/wiki/Metal-halide_lamp)
 
SPLFreak808

SPLFreak808

Well-Known Member
Yeah you loose what, 1/20th (really depends on glass type,thickness ect) the light from refraction and 1/10th the uv-b emitted is absorbed and converted to IR.
 
B

bryan oconner

Well-Known Member
Take the glass off . the light footprint will be much greater . major difference. Those 1k hps will cover a. 5/5 area no glass .
 
chemphlegm

chemphlegm

Well-Known Member
I removed my dust collecting ducted glass, and then sealed up my room and no longer use outdoor air for a blissful experience.
my par meter showed the truths. my bulbs never blew since ever, that would suck, mercury all over your plants, glass shards in your rolling bud...
 
GhostOfCastro

GhostOfCastro

Member
Fresh bulbs and ultra clean glass you'll get a 5% drop with a light meter vs same height minus the glass. Im sure dust and bulb age affect it more. It's negligible I think, but especially when running multiple lights. If you need glass to control your climate it's totally worth it, but if it's just in the way wrap em in paper and store them in a box. If they are nice conditions sell them and buy large adjustable wing reflectors.
 
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